volume_image_metadata missing from volume list

volume_image_metadata missing from volume list

The volume_image_metadata field was missing from the volume list
because we tried to filter VolumeGlanceMetadata against a non-existent
project_id field. Filtering should be done on the Volume associated
to the VolumeGlanceMetadata instead.

Move project_id filtering out of model_query as it assumes
the project_id field is in the queried model itself.
Build the filter ourselves against Volume.

Change-Id: I6053708296f2b5e24513dc87ed63da0f67c220ae
Closes-bug: #1337526