Add optional argument to save_fixture helper method
Add optional argument to save_fixture helper method

To save a fixture other than the 'response' key
of the json body, pass the object as a second argument
to 'save_fixture'

mpushpav/chorus,lukepolo/chorus,jamesblunt/chorus,atul-alpine/chorus,jamesblunt/chorus,jamesblunt/chorus,hewtest/chorus,hewtest/chorus,jamesblunt/chorus,hewtest/chorus,prakash-alpine/chorus,lukepolo/chorus,atul-alpine/chorus,prakash-alpine/chorus,prakash-alpine/chorus,lukepolo/chorus,atul-alpine/chorus,atul-alpine/chorus,hewtest/chorus,lukepolo/chorus,jamesblunt/chorus,hewtest/chorus,jamesblunt/chorus,lukepolo/chorus,atul-alpine/chorus,jamesblunt/chorus,mpushpav/chorus,mpushpav/chorus,prakash-alpine/chorus,lukepolo/chorus,hewtest/chorus,hewtest/chorus,lukepolo/chorus,mpushpav/chorus,mpushpav/chorus,mpushpav/chorus,mpushpav/chorus,atul-alpine/chorus,hewtest/chorus,atul-alpine/chorus,prakash-alpine/chorus