Comment 2 for bug 1284193

According to the diagnostic snapshot, corosync failed to install on the primary controller:
2014-02-24T13:57:56.081829+00:00 err: (/Stage[corosync_setup]/Corosync/Package[corosync]/ensure) change from absent to present failed: Execution of '/usr/bin/yum -d 0 -e 0 -y install corosync' returned 1: