Add a test for watch configuration

[ikhandamirov]

Description:

The automated test must make sure that the controller reacts correctly to the changes of the watched objects. See also. Btw., what are the change events to be considered/tested?

Think of a failure case when the watch is breaking (see here).

Also, when working on 'internal/controller/replication/controller_test.go', move clean-up resource deletion from end of unit test to DeferCleanup() right after creation of respective resources.

Done Criteria:

• Unit Tests created for new code or existing Unit Tests updated
• Integration Test Suite updated (includes deletion of existing unnecessary Integration Test and/or creation of new ones if required)