Cinder stable/folsom is not up to date with the rpc code in the stable/folsom branch of oslo-incubator. It needs to be brought up to date to include the latest fixes from oslo.
Specifically the oslo update includes the fix for: https://bugs.launchpad.net/quantum/+bug/1073999 The bug was OpenStack services failing to ever connect to Qpid if qpidd started after OpenStack services.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2013-0800.html