PROTON-606: Python testReclaimCredit: fix for windows causes hang in RHEL6 32-bit
This patch calls work() for each messenger even if it is stopped in order to
force a transition to stopped.

git-svn-id: https://svn.apache.org/repos/asf/qpid/proton/trunk@1603230 13f79535-47bb-0310-9956-ffa450edef68