ciao-controller: as part of workload validation check image/volume
ciao-controller: as part of workload validation check image/volume

Check the the volume or image specified in the workload creation request
is valid (including accessible to the current tenant.)

Fixes: #1224

Signed-off-by: Rob Bradford <c49e1dc14cd52e2644816db47123896e0ac79025@intel.com>

tpepper/ciao,ciao-project/ciao,kaccardi/ciao,01org/ciao,ciao-project/ciao,tpepper/ciao,kaccardi/ciao,rbradford/ciao,rbradford/ciao,tpepper/ciao,01org/ciao