DONT MERGE: Test/3.x/backedupmapdataloss

Committing a unit test for BackedMapDataLoss case reported by HP

This pull request will fail because it contains a unit test that is going to fail. It will reproduce a bug we have in the system.
One of the main problems in this test is, map configuration is defined with name `ClusterMapConfig` but actual map is created with the name `ClusterMap`.