Fixed heat-engine service stop.

* altered engine.pp for heat-engine service stopping during
update from 5.0 to 5.0.2
* altered pacemaker resource name from heat-engine to p_heat-engine
Closes-Bug: #1364026

Change-Id: Ic06bf843b22013d1eceb0f9881b1ee12681874b5
Merge "Fixed heat-engine service stop." into stable/5.0