Description of problem:
The test federation.FederationTests.test_pull_from_queue_recovery (from source rpm qpid-cpp-0.14-16.el6.src.rpm) fails somtimes with error message "Failed to find expected message containing 'Message 6'". During my testing it was failing at least once out of five testruns.

Version-Release number of selected component (if applicable):
python-qpid-0.14-8.el6.noarch
python-qpid-qmf-0.14-7.el6_2.s390x
qpid-cpp-client-0.14-16.el6.s390x
qpid-cpp-client-devel-0.14-16.el6.s390x
qpid-cpp-client-ssl-0.14-16.el6.s390x
qpid-cpp-debuginfo-0.14-16.el6.s390x
qpid-cpp-server-0.14-16.el6.s390x
qpid-cpp-server-devel-0.14-16.el6.s390x
qpid-cpp-server-ssl-0.14-16.el6.s390x
qpid-cpp-server-store-0.14-16.el6.s390x
qpid-java-client-0.14-3.el6.noarch
qpid-java-common-0.14-3.el6.noarch
qpid-java-example-0.14-3.el6.noarch
qpid-qmf-0.14-7.el6_2.s390x
qpid-qmf-debuginfo-0.14-7.el6_2.s390x
qpid-qmf-devel-0.14-7.el6_2.s390x
qpid-tests-0.14-1.el6_2.noarch
qpid-tools-0.14-2.el6_2.noarch

How reproducible:
about 20%

Steps to Reproduce:
1. Run unit test federation.FederationTests.test_pull_from_queue_recovery
2.
3.
  
Actual results:
The test sometimes fails.

Expected results:
The test always passes.

Additional info: