Show zero instead of empty for server count corresponding to reimage states.
Unassign roles of servers when we changed the cluster_id of server.
Add .gitreview for CI
Removed interface validation for reimage

Change-Id: Ie1de90e0b35a979b6e42ab79da334d123e3f0a93
Merge pull request #2 from Juniper/master

Pull changes from Juniper/sm to absingla/sm