bugfix: DCP STREAMREQ response carries rollback in response.Body.
bugfix: DCP STREAMREQ response carries rollback in response.Body.

dcp client was assuming it to be in response.Extras.

Change-Id: Iae5098e705bcfd163130f5c79cc922f51c2835b5

jchris/indexing,jchris/indexing,jchris/indexing,jchris/indexing