Delete backup created during replication

During replication, backup of the master instance is
taken, and a slave is created using this backup.
This patch cleans up the backup which is created
during this process (irrespective of whether it was
successfully provisioned or not).

Closes-Bug: #1359354
Change-Id: Ic636ffeb0bbfb9e6cc02690efe812ffc11bda85c
Merge "Delete backup created during replication"