Make image_props_filter use information from DB not RPC

Make image_props_filter directly use the data from host_state and not
the data from capabilities that is currently broadcast from the
scheduler over RPC, as this will be removed since it doesn't scale.

Once all capabilities usage in scheduler filters is
removed the capabilities RPC broadcast can be removed.

Part of bp no-compute-fanout-to-scheduler.

Change-Id: I5e6bcec517edbf606903c3e98f3c63f7ba370bcf
Merge "Make image_props_filter use information from DB not RPC"