image-stage call fails with TypeError saying 'stage() takes exactly
3 arguments (4 given). The reason is stage() also accepts image_size
as a argument which is not provided.
Further it raises 'NoneType' object has no attribute 'headers'. The
reason is stage() internally calls upload method which
returns a object of RequestIdWrapper on body (which is None) and
response. In stage call it again tries to add request id which requires
response object but instead it has a RequestIdWrapper which fails to
retrieve headers.
Change-Id: I4de4be7a55f35c3533b53acd48042c7c95b4bdc0
Closes-bug: #1711090