Stop using ResponseUtil in RH
Stop using ResponseUtil in RH

This fixes the problem where assigning headers fails if an RH with
DENY_FRAMES enabled returns a tuple.

OmeGak/indico,DirkHoffmann/indico,indico/indico,pferreir/indico,OmeGak/indico,ThiefMaster/indico,DirkHoffmann/indico,ThiefMaster/indico,DirkHoffmann/indico,DirkHoffmann/indico,OmeGak/indico,mic4ael/indico,pferreir/indico,ThiefMaster/indico,indico/indico,OmeGak/indico,mic4ael/indico,indico/indico,pferreir/indico,mic4ael/indico,indico/indico,ThiefMaster/indico,pferreir/indico,mic4ael/indico