Rackspace cloud database resource provider

Change-Id: I0bdacb844d5e5999e70918352e58856c1b21692c
Merge "Rackspace cloud database resource provider"
Merge remote branch 'upstream/master' into bp-dev/rackspace-cloud-servers-provider
Remove unused import

Change-Id: Icc40a9dc4c321a929c7c0fa490eea47003db1f5b