The Mistral workflows should retry sending messages to Zaqar

[Dougal Matthews]

"Error response from Zaqar. Code: 503. Title: Service temporarily unavailable. Description: Messages could not be enqueued. Please try again in a few seconds.."

Sometimes workflows are failing with this error message. It sounds like we should add retrying to the Zaqar message sending.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/377827

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/377827
Committed: https://git.openstack.org/cgit/openstack/tripleo-common/commit/?id=7ee66120acf48a069905aacd8e92367bd47ac11b
Submitter: Jenkins
Branch: master

commit 7ee66120acf48a069905aacd8e92367bd47ac11b
Author: Dougal Matthews <email address hidden>
Date: Tue Sep 27 17:07:57 2016 +0100

    Retry sending messages to Zaqar if it fails

    Sometimes messages to Zaqar fail with with the following error.

    > Error response from Zaqar. Code: 503. Title: Service temporarily
    > unavailable. Description: Messages could not be enqueued. Please
    > try again in a few seconds..

    When this happens we should retry as it states. This change has
    the task retry calling the queue_post action a maximum of 5 times
    with a 1 second delay between each attempt.

    Closes-Bug: #1626103
    Change-Id: Iba272004a8adb7ebc5122fc47764dbf81925bc62

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/tripleo-common 5.2.0 release.