Fix incorrect event log for ambari
Fix incorrect event log for ambari

'Preparing policy files' step had incorrect count: '6/5'. It's because
this step was inside of 'Prepare Kerberos' step.

Change-Id: I2909085d7035d89d4a07cc249390c2e6589c0c16
closes-bug: 1627081

egafford/sahara,tellesnobrega/sahara,openstack/sahara,tellesnobrega/sahara,egafford/sahara,openstack/sahara