Add share backup feature. This will allow the user to create,
restore and delete backups as well as listing backups and showing
the details of a specific backup.
Implement: blueprint share-backup
Depends-On: Ice01ab7892b1eb52b3202f2c79957977f73f3aca
Change-Id: I2c3848cbbeb921ede74756e25e58ef82277e0d2b