Exercise cleanup

boot_from_volume.sh
volumes.sh

Change-Id: Ib93dcdfdead93c259e3cd184fbc5ccc0a4a87c9a
Merge branch 'init-split' into dt-test
Merge branch 'nova-config-cleanup' into dt-test
Merge branch 'database-service' into dt-test
Merge branch 'clean-ex' into dt-test