Updated openstack/openstack
Project: openstack/cinder  d943bafbb8908ba9f85be8e2a0e48a80d27ae48a
null
Create volume fail when image id is ""

When call create volume api with image id "", it will create an empty
volume.
But when create volume with snapshot id "" or srv volume "", it will
return an 404 error.
So it should create volume fail when call create volume api with image id
"".

Change-Id: If2c7b061753bbbd172a09d35b343e73e90a1b7b4
Closes-Bug: #1302609