Make ha disabled now works a little better
Make corosync commands for adding/removing/updating node more reliable
Do not ask for replication if you are the single node
Override _stopDaemon

* stop pacemaker service returned bad exit codes
* stop a non-existing upstart job is fixed
Added ha for replication

To replicate only floating IP addresses
Merge pull request #984 from Zentyal/ejhernandez/ha-fixes

HA fixes