* Volumes are created using the bay's trusstee user
scoped by the bay's trustID.
* In volume-service.sh it is checked if rexray exists
in the image, so if you have built an image with
rexray it will configure and start rexray service.
This change replaces:
Ie5e78e6b9d06fd2c92915b8635b8062c008e9696
Change-Id: I11043d5edcf73a87220c86320f9938b9347c118f
Partially-Implements: blueprint magnum-integrate-with-cinder
1466f93b21