Fix pacemaker cluster configuration

* replaces crm with crm_attribute, crm is a separate tool which is not
  available for redhat distros. crm_attribute should be available in all
  supported distros.
* cluster configuration is done only once on bootstrap host
* adds sleep to let pacemaker start up properly

Change-Id: Ie14fd68a49d7312d3817c25a305eca7a2aa9c9cf
Merge "Fix pacemaker cluster configuration"