unit test fix for #3052 and #3053

@mdogan 
Ok, Thanks for you explanation.

Is there any way to check that is there any process for restoring missing backups ?
For example I have 3 nodes (n1, n2, n3), I have a distributed map with backup count 2 and assume that backups are stored on n1 and n2. Then n1 is shutdown and backup process started on n3 for taking backups from n2 instead of n3. For this test should I wait for finishing backup process on n3 ?