Remove extraneous space from error message
Remove extraneous space from error message

Follow-up to fix a typo noted during review of Change
I6d45aeab065197a85ce.

Change-Id: I38a7b5413268478415bc9fe9a4e9df950b53b63f

mahak/cinder,mahak/cinder,openstack/cinder,openstack/cinder