Consume the update zaqar queue to get the ansible output in
real time.
The queue used is not the 'tripleo' queue because we need
to not be disrupt by other messages.
We need to claim all the zaqar messages in the queue to
get a consistent ansible output
Change-Id: I3682051eb719f8da9c744f7ec8be3a58f3db3f86
Closes-Bug: 1732497