When share server migration is completed, get migration progress query
fails since source share server is deleted in Manila. However, Manila is
able to return status i.e. 100% when queried using source share server.
The manilaclient is fixed to handle this scenario.
Closes-bug: #2068732
Change-Id: Ia4ac62e740ca6a2882fbeadc6b60ebea3edc1b5e
Signed-off-by: Kiran Pawar <kinpaa@gmail.com>