## Consecutive Dates

The system will now check that the Revision dates are consecutive. If
there are a bunch of identical dates, it will push each duplicate date
by 1 second to ensure that each one is consecutive.
          
 #1660 #1975

## User Mappings

There was a request to have the ability to map users to try and maintain
integrity across different systems. We added a TfsUserMappingEnricher`
that allows you to map users from Source to Target... this is not free
and takes some work. Runnin the `ExportUsersForMappingConfig` to get the
list of users will produce:

```
[
  {
    "Source": {
      "FriendlyName": "Martin Hinshelwood nkdAgility.com",
      "AccountName": "martin@nkdagility.com"
    },
    "target": {
      "FriendlyName": "Hinshelwood, Martin",
      "AccountName": "martin@othercompany.com"
    }
  },
  {
    "Source": {
      "FriendlyName": "Rollup Bot",
      "AccountName": "Bot@nkdagility.com"
    },
    "target": {
      "FriendlyName": "Service Account 4",
      "AccountName": "randoaccount@somecompany.com"
    }
  },
  {
    "Source": {
      "FriendlyName": "Another non mapped Account",
      "AccountName": "not-mapped@nkdagility.com"
    },
    "target": null
  }
]
```



##How it works

1. Run `ExportUsersForMappingConfig` which will export all of the Users
in Soruce Mapped or not to target.
2. Run `WorkItemMigrationConfig` which will run a validator by detail to
warn you of missing users. If it finds a mapping it will convert the
field...

##Notes
- Applies to all identity fields specified in the list
- It really sucks that we have to match on Display name! Email is
included for internal matching
- On 'ExportUsersForMappingConfig` you can set
`OnlyListUsersInWorkItems` to filter the mapping based on the scope of
the query. This is greater if you have many users.
- Both use the `TfsUserMappingEnricherOptions` setting in
`CommonEnrichersConfig` to know what to do.

```
{
  "ChangeSetMappingFile": null,
  "Source": {
    "$type": "TfsTeamProjectConfig",
    "Collection": "https://dev.azure.com/nkdagility/",
    "Project": "AzureDevOps-Tools",
    "ReflectedWorkItemIDFieldName": "nkdScrum.ReflectedWorkItemId",
    "AllowCrossProjectLinking": false,
    "AuthenticationMode": "Prompt",
    "PersonalAccessToken": "",
    "PersonalAccessTokenVariableName": "",
    "LanguageMaps": {
      "AreaPath": "Area",
      "IterationPath": "Iteration"
    }
  },
  "Target": {
    "$type": "TfsTeamProjectConfig",
    "Collection": "https://dev.azure.com/nkdagility-preview/",
    "Project": "migrationTest5",
    "ReflectedWorkItemIDFieldName": "nkdScrum.ReflectedWorkItemId",
    "AllowCrossProjectLinking": false,
    "AuthenticationMode": "Prompt",
    "PersonalAccessToken": "",
    "PersonalAccessTokenVariableName": "",
    "LanguageMaps": {
      "AreaPath": "Area",
      "IterationPath": "Iteration"
    }
  },
  "FieldMaps": [],
  "GitRepoMapping": null,
  "LogLevel": "Debug",
  "CommonEnrichersConfig": [
    {
      "$type": "TfsUserMappingEnricherOptions",
      "Enabled": true,
      "UserMappingFile": "C:\\temp\\userExport.json",
      "IdentityFieldsToCheck": [
        "System.AssignedTo",
        "System.ChangedBy",
        "System.CreatedBy",
        "Microsoft.VSTS.Common.ActivatedBy",
        "Microsoft.VSTS.Common.ResolvedBy",
        "Microsoft.VSTS.Common.ClosedBy"
      ]
    }
  ],
  "Processors": [
    {
      "$type": "ExportUsersForMappingConfig",
      "Enabled": true,
      "WIQLQuery": "SELECT [System.Id] FROM WorkItems WHERE [System.TeamProject] = @teamproject AND [System.WorkItemType] NOT IN ('Test Suite', 'Test Plan','Shared Steps','Shared Parameter','Feedback Request') ORDER BY [System.ChangedDate] desc",
      "OnlyListUsersInWorkItems": true
    }
  ],
  "Version": "15.0"
}
```

Resolves #1976
          
Export users for mapping context (#1969) for MrHinsh

---------

Co-authored-by: Nico Orschel <norschel@users.noreply.github.com>
Co-authored-by: Tom Frenzel <40773830+tomfrenzel@users.noreply.github.com>