This patch adds a spec for exposing the store specific information
for optimizing upload volume to image operation from cinder rbd
backend to glance rbd backend.
Implements: blueprint expose-store-specific-info
Co-Authored-by: Rajat Dhasmana <rajatdhasmana@gmail.com>
Change-Id: I0db7a1a73de8b41460498ae389a059153d945386