Changing Eval State Only if Changed in AVS

[ralikio]

Description
Orchestration logic in KEB keeps AVS maintenance mode in operation's Instance Details in operation.Avs.AvsInternalEvaluationStatus in its Original and Current fields.

Current behaviour is as follows:

1. Orchestration is initiated.
2. KEB creates first operation for given instance - instance details field on operation is initialized with the value from a previous operation - current Instance details status is ACTIVE and original one is not important at this point.
3. KEB call setMaintenanceStatus method
4. In the set maintenance call - KEB refreshes current AVS state by calling AVS client.
5. In the set maintenance call - If state is different then current KEB state then KEB sets maintenance mode in AVS client.
6. In the set maintenance call - Regardless of the change in instance details state KEB sets maintenance mode on current operation's Instance Details.
7. Current Instance details status is MAINTENANCE and original one is ACTIVE
8. Operation Failes.
9. Orchestration is retries, new operation is created,
10. KEB repeats points 4 and 5.
11. Current Instance details status is MAINTENANCE and previous one is MAINTENANCE
12. On operation success KEB sets maintenance mode to previous value which is MAINTENANCE

The following fix corrects this behaviour by invoking evalAssistant.SetEvalStatus(lifecycleData, status) only if current KEB state is different then AVS state.
Related issue(s)

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[kyma-bot]

New changes are detected. LGTM label has been removed.

[szwedm]

/lgtm