Add restore_visible and restore_by_tag to virtual.QoS.  Fixes error when ack_emulation disabled in redis transport.
Add restore_visible and restore_by_tag to virtual.QoS.  Fixes error when ack_emulation disabled in redis transport.

ZoranPavlovic/kombu,tkanemoto/kombu,alex/kombu,urbn/kombu,numb3r3/kombu,celery/kombu,bmbouter/kombu,cce/kombu,ZoranPavlovic/kombu,alex/kombu,daevaorn/kombu,iris-edu-int/kombu,jindongh/kombu,jindongh/kombu,daevaorn/kombu,bmbouter/kombu,mverrilli/kombu,tkanemoto/kombu,Elastica/kombu,iris-edu-int/kombu,Elastica/kombu,cce/kombu,numb3r3/kombu,mverrilli/kombu