Comment 2 for bug 1742915

Reviewed: https://review.openstack.org/533185
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=41988eab39b742481d9ea994c4600ba49110f585
Submitter: Zuul
Branch: master

commit 41988eab39b742481d9ea994c4600ba49110f585
Author: Steven Hardy <email address hidden>
Date: Fri Jan 12 13:17:08 2018 +0000

    Default empty map for docker_config steps

    In the event a step has no services defined, we must still write the
    config, as this is needed if services are disabled on update such that
    a step becomes empty - we must run paunch on every step or the cleanup
    of the "old" services does not happen.

    Closes-Bug: 1742915
    Change-Id: Iee01002f56b5311560557f2bf6f053601b9d43d7