Use nova flavor provider to create Manila flavor
Use nova flavor provider to create Manila flavor

https://review.openstack.org/312657 used the new nova flavor provider
for Nova and Tempest. This change completes it with the flavor used
by Manila.

Change-Id: I50dc8f4b2ed375560f261cf6ee5164229fea14a6

openstack/packstack,openstack/packstack,mahak/packstack,fr34k8/packstack,stackforge/packstack,mahak/packstack,fr34k8/packstack,fr34k8/packstack,stackforge/packstack,mahak/packstack,openstack/packstack,stackforge/packstack