Updated openstack/openstack
Project: openstack/oslo.vmware  81beebbc60b40a4e674269585108161767bda883

Port the Datastore and DatastorePath objects

This patch ports the Datastore and DatastorePath objects which have
been approved in Nova and will be useful in Glance.
Finally, it adds the units module from oslo-incubator.

Change-Id: Ia519a83ed09fde74be376981f89284af20aa1dab