Update ref used for notifications

When we update a snapshot status in the db, we need to
use the newly updated snapshot-ref object in the following
notification method call.  Otherwise we're sending a
notifciation message with the old/outdated status
information.

NOTE: This also fixes the unit test that was written to
pass with the bug that existed in the notification.

Closes-Bug: #1349805

Change-Id: I32b86d7edd836310c6da7adffa46e915361668f0
Merge "Update ref used for notifications"