HornetQ shared store live/backup configuration does not failover correctly.

Issue

• Two HornetQ instances are configured as a live/backup pair with shared storage using GFS2.
  The logs show that the backup instance becomes active immediately on start up instead of waiting for the live instance to stop.

2013-10-30 19:02:37,927 INFO  [org.hornetq.core.server] (HQ119000: Activation for server HornetQServerImpl::serverUUID=4f23b5c4-3c05-11e3-9dbc-51b183d8fb28) HQ221109: HornetQ Backup Server version 2.3.1.Final (BZ1017943, 123) [4f23b5c4-3c05-11e3-9dbc-51b183d8fb28] started, waiting live to fail before it gets active
...
2013-10-30 19:02:37,927 DEBUG [org.hornetq.core.server] (HQ119000: Activation for server HornetQServerImpl::serverUUID=4f23b5c4-3c05-11e3-9dbc-51b183d8fb28) acquired live node lock state = L
...
2013-10-30 19:02:37,975 INFO  [org.hornetq.core.server] (Thread-0 (HornetQ-server-HornetQServerImpl::serverUUID=4f23b5c4-3c05-11e3-9dbc-51b183d8fb28-359279779)) HQ221031: backup announced
...
2013-10-30 19:02:40,187 INFO  [org.hornetq.core.server] (HQ119000: Activation for server HornetQServerImpl::serverUUID=4f23b5c4-3c05-11e3-9dbc-51b183d8fb28) HQ221010: Backup Server is now live