Comment 7 for bug 1813832

Reviewed: https://review.openstack.org/634616
Committed: https://git.openstack.org/cgit/openstack/tripleo-common/commit/?id=c1341fc4d19a3bfa40648cf893d51f9e5dfa78ba
Submitter: Zuul
Branch: master

commit c1341fc4d19a3bfa40648cf893d51f9e5dfa78ba
Author: Steve Baker <email address hidden>
Date: Mon Feb 4 09:47:50 2019 +1300

    Authorize undercloud tripleo-admin user

    This adds the public key into the .ssh/authorized_keys file
    in /home/tripleo-admin. Failure is ignored because this may be running
    on an undercloud which doesn't yet have a configured tripleo-admin
    user.

    This change also refactors the removal of the generate_playbook task
    since the playbook now just invokes a role, there is no maintainence
    benefit to justify the extra complexity.

    Partial-Bug: #1813832
    Change-Id: Id2ee912c456d66ed189fd5fdbaa5c1c3627bdf20
    Depends-On: I4c8ee04534636622581eb386c01790d6610e7f58