Updated openstack/openstack
Project: openstack/heat  015daff84aaa56fecf61631c6ad639da387f257a
null
Fix regression in Rackspace Cloud Servers tests

Commit 63b7f14403 introduced a regression in the Rackspace Cloud Server
tests.  Instance.volumes() now relies on its VOLUME property's default.
Since CloudServer inherits volumes() from Instance but defines its own
VOLUMES property, its VOLUMES property should also have a default.

Closes-Bug: #1265034
Change-Id: Ib17337c5d06aedf65da5497ad48858d649ba4e96