[Cinder] Stack volumes instead of spreading out
[Cinder] Stack volumes instead of spreading out

This patch changes the default Capacity Weigher to
stack volumes on a datastore instead of spreading them out.
This will help prevent smaller volumes from landing on the
most free datastores in a shard.  This will help keep the
newer created/most free datastores for the largest of volumes.

sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts