Updated openstack/openstack
Project: openstack/heat  24e948d762e39271bb475a6ae657f389cfc18312

Add Nova flavor constraint for SaharaNodeGroupTemplate

Add nova.flavor custom constraint for
SaharaNodeGroupTemplate resource, to validate
the flavor's existence.

Change-Id: Ia5abf6da88eb2f701978bcc637a417706831ed0f