Remove kombu as a dependency for Trove
Remove kombu as a dependency for Trove

It was required before oslo.messaging.

Change-Id: I39893da56a14e33d5ad746795e35fb912a128314

zhangg/trove,openstack/trove,mmasaki/trove,mmasaki/trove,hplustree/trove,redhat-openstack/trove,hplustree/trove,openstack/trove,redhat-openstack/trove,zhangg/trove,redhat-openstack/trove,mmasaki/trove