Updated openstack/openstack
Project: openstack/nova  250b92d0787d1496894ee02890aab7d37c992b0f
null
baremetal: refactor out powervm dependency

For some reason part of the baremetal driver was
importing some of the common modules from the
powervm driver. This change moves the code baremetal
was using into a new baremetal only module to remove
the strange cross driver dependency.

Change-Id: Id5f48bed4ecff7cd776346b34c34f3a2094f2296