tests: dtmf method is not always auto
tests: dtmf method is not always auto

ahmedammar/skype_farsight2,tieto/farstream,pexip/farstream,pexip/farstream,shadeslayer/farstream,shadeslayer/farstream,shadeslayer/farstream,ahmedammar/skype_farsight2,tieto/farstream,kakaroto/farstream,kakaroto/farstream,pexip/farstream,tieto/farstream,pexip/farstream,tieto/farstream,tieto/farstream,ahmedammar/skype_farsight2,ahmedammar/skype_farsight2,shadeslayer/farstream,kakaroto/farstream,kakaroto/farstream