Strip \r from build UUID in fingergw

Without stripping this, we won't be able to match UUIDs.

Change-Id: I06b98b7f883433313304bfc3bb21edd5725b94e6

zuul/lib/log_streamer.py

@@ -56,8 +56,6 @@ class RequestHandler(streamer_utils.BaseFingerRequestHandler):
             self.request.sendall(msg.encode("utf-8"))
             return
 
-        build_uuid = build_uuid.rstrip()
-
         # validate build ID
         if not re.match("[0-9A-Fa-f]+$", build_uuid):
             msg = 'Build ID %s is not valid' % build_uuid