kombu: remove compat of folsom reply format
kombu: remove compat of folsom reply format

This change removes codepath where _reply_q is not
present in the message dict.

This kind of messages have been deprecated in grizzly and cannot
be emitted since havana.

https://github.com/openstack/oslo-incubator/commit/70891c271e011f59792933eaf65c3214493ef14a

Change-Id: I20558d9fae8f56970c967aa0def77cfb2a1ca3ec

ozamiatin/oslo.messaging,ozamiatin/oslo.messaging,dukhlov/oslo.messaging,dukhlov/oslo.messaging