Changed docker_restart_policy to unless-stopped

Current implementation has docker_restart_policy "always" and
docker_restart_policy_retry:"10" which should be mutually exclusive.
"unless-stopped" will restart the containers on any exit state
but not start on daemon startup if container was put to stopped state before.
Closes-Bug: #1621187

Change-Id: I4d881cd123a55625121b7a9047385e9b54e2e129