Fix Timestamp diff in Instance and Notification

    Code is updating timestamp to clear out task status after it
    has already completed the task and updated the instance db
    info.  Made this an single transaction so that the timestamp
    in the db matches the actual action and the notification

Closes-Bug: 1236620

Change-Id: Iaa59f6e6d0b958e79b0491bfa2a838f5896d9705
Merge "Fix Timestamp diff in Instance and Notification"
Merge pull request #1 from openstack/master

pull newest  code