Move cinder-volume creation to post-configure

This is actually not what migration is for. If something must happen
before a service is started, that is a post configuration thing that we
should order before enabling/starting/restarting the service.

Os-refresh-config will be changed to run migration after post-configure,
since it is for on-line things, not offline things.

Change-Id: I2c4eccab3010ec91fcd8129951f638b37bc0932a
Parameterize geard broker and test env public interface

Leave original behaviour as the default.

Change-Id: Id3c96e543a8c1a31f895931f3f34c6e8c50a1120
Rename Openstack to OpenStack

Change-Id: I926fd847a9b016c48b03f1b8b41ec92c9610e271
Look for local.json in preference to config.json.

We've had a long standing ugliness where config.json was edited by
devtest to set the ssh username, and then when one commits a
tripleo-image-elements change, it would include your username. This is
undesirable :).

Change-Id: I3129bf638e519f2b03a05cae482e26fd5aef40b1
Merge "Parameterize geard broker and test env public interface"
Merge "Rename Openstack to OpenStack"
Remove no longer needed generation of the virtual-power-key

With the recent change to inject the powerkey into the image (e401ef4f)
os-refresh-config does not need to generate a key anymore.

Change-Id: Ie253cac1fc189e226995ddcff16eeb24b321ddc4
Merge "Look for local.json in preference to config.json."
Merge "Move cinder-volume creation to post-configure"
Merge "Remove no longer needed generation of the virtual-power-key"