In docstring of list() method of glanceclient/v1/images.py,
parameter 'return_request_id' used within **kwargs is
'return_req_id', not 'return_request_id'.
Changed 'return_request_id' to 'return_req_id'.
Change-Id: I7f4a2a5af1b13184c67fa81be971dc5139569f8b
Closes-Bug: 1573049