Fix the the below issues as part of this patch
- Fix the issue when backup is created with wrong config. Due to
wrong config backup status is not changing from creating status
to failed.
- Failed the backup creation when SnapMirror relationship created
during backup creation was not healthy.
- Added few fields in snapmirror GET API to fix the REST
workflow for backup.
- Incorporated left over review comments of patch
I5a4edbf547e7886fb4fa9c1bed90110a33f9bf3b
Closes-Bug: #2058027
Change-Id: I013ff3eedea54d9895e4c0446017aeb62c6bb833
