azurerm_function_app app_settings refresh plan is not empty

[yupwei68]

Fix: #6909

TestAccAzureRMFunctionApp_siteConfigMulti test fails for it has a comment to allow its failure

=== RUN TestAccAzureRMFunctionApp_appSettings
=== PAUSE TestAccAzureRMFunctionApp_appSettings
=== CONT TestAccAzureRMFunctionApp_appSettings
--- PASS: TestAccAzureRMFunctionApp_appSettings (373.24s)
=== RUN TestAccAzureRMFunctionApp_basic
=== PAUSE TestAccAzureRMFunctionApp_basic
=== CONT TestAccAzureRMFunctionApp_basic
--- PASS: TestAccAzureRMFunctionApp_basic (200.02s)
=== RUN TestAccAzureRMFunctionApp_deprecatedConnectionString
=== PAUSE TestAccAzureRMFunctionApp_deprecatedConnectionString
=== CONT TestAccAzureRMFunctionApp_deprecatedConnectionString
--- PASS: TestAccAzureRMFunctionApp_deprecatedConnectionString (182.47s)
=== RUN TestAccAzureRMFunctionApp_deprecatedConnectionStringMissingError
=== PAUSE TestAccAzureRMFunctionApp_deprecatedConnectionStringMissingError
=== CONT TestAccAzureRMFunctionApp_deprecatedConnectionStringMissingError
--- PASS: TestAccAzureRMFunctionApp_deprecatedConnectionStringMissingError (100.85s)
=== RUN TestAccAzureRMFunctionApp_deprecatedNeedBothSAAtrributesError
=== PAUSE TestAccAzureRMFunctionApp_deprecatedNeedBothSAAtrributesError
=== CONT TestAccAzureRMFunctionApp_deprecatedNeedBothSAAtrributesError
--- PASS: TestAccAzureRMFunctionApp_deprecatedNeedBothSAAtrributesError (105.36s)
=== RUN TestAccAzureRMFunctionApp_requiresImport
=== PAUSE TestAccAzureRMFunctionApp_requiresImport
=== CONT TestAccAzureRMFunctionApp_requiresImport
--- PASS: TestAccAzureRMFunctionApp_requiresImport (197.67s)
=== RUN TestAccAzureRMFunctionApp_tags
=== PAUSE TestAccAzureRMFunctionApp_tags
=== CONT TestAccAzureRMFunctionApp_tags
--- PASS: TestAccAzureRMFunctionApp_tags (184.50s)
=== RUN TestAccAzureRMFunctionApp_tagsUpdate
=== PAUSE TestAccAzureRMFunctionApp_tagsUpdate
=== CONT TestAccAzureRMFunctionApp_tagsUpdate
--- PASS: TestAccAzureRMFunctionApp_tagsUpdate (236.73s)
=== RUN TestAccAzureRMFunctionApp_siteConfig
=== PAUSE TestAccAzureRMFunctionApp_siteConfig
=== CONT TestAccAzureRMFunctionApp_siteConfig
--- PASS: TestAccAzureRMFunctionApp_siteConfig (203.37s)
=== RUN TestAccAzureRMFunctionApp_linuxFxVersion
=== PAUSE TestAccAzureRMFunctionApp_linuxFxVersion
=== CONT TestAccAzureRMFunctionApp_linuxFxVersion
--- PASS: TestAccAzureRMFunctionApp_linuxFxVersion (210.94s)
=== RUN TestAccAzureRMFunctionApp_connectionStrings
=== PAUSE TestAccAzureRMFunctionApp_connectionStrings
=== CONT TestAccAzureRMFunctionApp_connectionStrings
--- PASS: TestAccAzureRMFunctionApp_connectionStrings (235.29s)
=== RUN TestAccAzureRMFunctionApp_updateVersion
=== PAUSE TestAccAzureRMFunctionApp_updateVersion
=== CONT TestAccAzureRMFunctionApp_updateVersion
--- PASS: TestAccAzureRMFunctionApp_updateVersion (253.16s)
=== RUN TestAccAzureRMFunctionApp_3264bit
=== PAUSE TestAccAzureRMFunctionApp_3264bit
=== CONT TestAccAzureRMFunctionApp_3264bit
--- PASS: TestAccAzureRMFunctionApp_3264bit (245.15s)
=== RUN TestAccAzureRMFunctionApp_httpsOnly
=== PAUSE TestAccAzureRMFunctionApp_httpsOnly
=== CONT TestAccAzureRMFunctionApp_httpsOnly
--- PASS: TestAccAzureRMFunctionApp_httpsOnly (233.81s)
=== RUN TestAccAzureRMFunctionApp_dailyMemoryTimeQuota
=== PAUSE TestAccAzureRMFunctionApp_dailyMemoryTimeQuota
=== CONT TestAccAzureRMFunctionApp_dailyMemoryTimeQuota
--- PASS: TestAccAzureRMFunctionApp_dailyMemoryTimeQuota (461.59s)
=== RUN TestAccAzureRMFunctionApp_consumptionPlan
=== PAUSE TestAccAzureRMFunctionApp_consumptionPlan
=== CONT TestAccAzureRMFunctionApp_consumptionPlan
--- PASS: TestAccAzureRMFunctionApp_consumptionPlan (267.14s)
=== RUN TestAccAzureRMFunctionApp_consumptionPlanUppercaseName
=== PAUSE TestAccAzureRMFunctionApp_consumptionPlanUppercaseName
=== CONT TestAccAzureRMFunctionApp_consumptionPlanUppercaseName
--- PASS: TestAccAzureRMFunctionApp_consumptionPlanUppercaseName (231.85s)
=== RUN TestAccAzureRMFunctionApp_createIdentity
=== PAUSE TestAccAzureRMFunctionApp_createIdentity
=== CONT TestAccAzureRMFunctionApp_createIdentity
--- PASS: TestAccAzureRMFunctionApp_createIdentity (298.92s)
=== RUN TestAccAzureRMFunctionApp_updateIdentity
=== PAUSE TestAccAzureRMFunctionApp_updateIdentity
=== CONT TestAccAzureRMFunctionApp_updateIdentity
--- PASS: TestAccAzureRMFunctionApp_updateIdentity (320.03s)
=== RUN TestAccAzureRMFunctionApp_userAssignedIdentity
=== PAUSE TestAccAzureRMFunctionApp_userAssignedIdentity
=== CONT TestAccAzureRMFunctionApp_userAssignedIdentity
--- PASS: TestAccAzureRMFunctionApp_userAssignedIdentity (354.79s)
=== RUN TestAccAzureRMFunctionApp_loggingDisabled
=== PAUSE TestAccAzureRMFunctionApp_loggingDisabled
=== CONT TestAccAzureRMFunctionApp_loggingDisabled
--- PASS: TestAccAzureRMFunctionApp_loggingDisabled (185.11s)
=== RUN TestAccAzureRMFunctionApp_updateLogging
=== PAUSE TestAccAzureRMFunctionApp_updateLogging
=== CONT TestAccAzureRMFunctionApp_updateLogging
--- PASS: TestAccAzureRMFunctionApp_updateLogging (369.63s)
=== RUN TestAccAzureRMFunctionApp_authSettings
=== PAUSE TestAccAzureRMFunctionApp_authSettings
=== CONT TestAccAzureRMFunctionApp_authSettings
--- PASS: TestAccAzureRMFunctionApp_authSettings (185.78s)
=== RUN TestAccAzureRMFunctionApp_corsSettings
=== PAUSE TestAccAzureRMFunctionApp_corsSettings
=== CONT TestAccAzureRMFunctionApp_corsSettings
--- PASS: TestAccAzureRMFunctionApp_corsSettings (195.02s)
=== RUN TestAccAzureRMFunctionApp_enableHttp2
=== PAUSE TestAccAzureRMFunctionApp_enableHttp2
=== CONT TestAccAzureRMFunctionApp_enableHttp2
--- PASS: TestAccAzureRMFunctionApp_enableHttp2 (196.20s)
=== RUN TestAccAzureRMFunctionApp_minTlsVersion
=== PAUSE TestAccAzureRMFunctionApp_minTlsVersion
=== CONT TestAccAzureRMFunctionApp_minTlsVersion
--- PASS: TestAccAzureRMFunctionApp_minTlsVersion (199.97s)
=== RUN TestAccAzureRMFunctionApp_ftpsState
=== PAUSE TestAccAzureRMFunctionApp_ftpsState
=== CONT TestAccAzureRMFunctionApp_ftpsState
--- PASS: TestAccAzureRMFunctionApp_ftpsState (245.58s)
=== RUN TestAccAzureRMFunctionApp_preWarmedInstanceCount
=== PAUSE TestAccAzureRMFunctionApp_preWarmedInstanceCount
=== CONT TestAccAzureRMFunctionApp_preWarmedInstanceCount
--- PASS: TestAccAzureRMFunctionApp_preWarmedInstanceCount (259.39s)
=== RUN TestAccAzureRMFunctionApp_oneIpRestriction
=== PAUSE TestAccAzureRMFunctionApp_oneIpRestriction
=== CONT TestAccAzureRMFunctionApp_oneIpRestriction
--- PASS: TestAccAzureRMFunctionApp_oneIpRestriction (245.58s)
=== RUN TestAccAzureRMFunctionApp_oneVNetSubnetIpRestriction
=== PAUSE TestAccAzureRMFunctionApp_oneVNetSubnetIpRestriction
=== CONT TestAccAzureRMFunctionApp_oneVNetSubnetIpRestriction
--- PASS: TestAccAzureRMFunctionApp_oneVNetSubnetIpRestriction (214.37s)
=== RUN TestAccAzureRMFunctionApp_ipRestrictionRemoved
=== PAUSE TestAccAzureRMFunctionApp_ipRestrictionRemoved
=== CONT TestAccAzureRMFunctionApp_ipRestrictionRemoved
--- PASS: TestAccAzureRMFunctionApp_ipRestrictionRemoved (332.78s)
=== RUN TestAccAzureRMFunctionApp_manyIpRestrictions
=== PAUSE TestAccAzureRMFunctionApp_manyIpRestrictions
=== CONT TestAccAzureRMFunctionApp_manyIpRestrictions
--- PASS: TestAccAzureRMFunctionApp_manyIpRestrictions (273.04s)
=== RUN TestAccAzureRMFunctionApp_updateStorageAccountKey
=== PAUSE TestAccAzureRMFunctionApp_updateStorageAccountKey
=== CONT TestAccAzureRMFunctionApp_updateStorageAccountKey
--- PASS: TestAccAzureRMFunctionApp_updateStorageAccountKey (318.79s)

[jackofallops]

Thanks @yupwei68 - This LGTM 👍

[jackofallops]

Tests pass:

2 failures unrelated to changes

[ghost]

This has been released in version 2.16.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 2.16.0"
}
# ... other configuration ...

[ghost]

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