Comment 58 for bug 1750656

Reviewed: https://review.openstack.org/547399
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-ceph_client/commit/?id=50ea8b644c0713d007f6f172cd7bbc850f44a55a
Submitter: Zuul
Branch: stable/queens

commit 50ea8b644c0713d007f6f172cd7bbc850f44a55a
Author: Jesse Pretorius <email address hidden>
Date: Thu Feb 22 14:23:47 2018 +0000

    Fix cache update after initial apt_repository fail

    If apt_repository fails to update the apt cache after updating the
    configuration, retries don't register there was a change and so no
    attempt is made to update the cache by the module on the second attempt.
    This failure can result in a failure to install packages.

    This change adds an apt module task to update the cache if the
    apt_repository task registers a change. This means updating the cache
    will get retried on failure and no longer fail silently.

    Change-Id: I43bd89e9bd5e2094eb0c138e17045ea64cd62c4d
    Partial-Bug: #1750656
    (cherry picked from commit db7093684666282d9890eb564b7424ab4ae3cf75)