jsonrpc: StoragePool_getDomainsContainingImage

Align naming between API.py and schema.

Change-Id: Ic4bcca37ffa5e35636606c0d0cf0c4218068a833
Signed-off-by: pkliczewski <piotr.kliczewski@gmail.com>
Reviewed-on: http://gerrit.ovirt.org/35547
Reviewed-by: Oved Ourfali <oourfali@redhat.com>
Reviewed-by: Adam Litke <alitke@redhat.com>