Specification to add user/group support in RefStack
Specification to add user/group support in RefStack

As RefStack implements the vendor/product entities, RefStack needs
to allow management and visibility of these entities to a group of
users not just the user who created the entities.

Change-Id: Ib1ef631c6b02746a30970adf0289549642348cf1

stackforge/refstack,openstack/refstack,stackforge/refstack,stackforge/refstack,openstack/refstack,stackforge/refstack,openstack/refstack,openstack/refstack