drill

c6c5d27d - DRILL-143: CGroup Support for Drill-on-YARN

DRILL-143: CGroup Support for Drill-on-YARN Initial patch 1. Minor fix up 2. Updated variable name for pid file Revert changes to yarn-drillbit.sh Based on discussion for PR #1239 (Ref: https://github.com/apache/drill/pull/1239) closes #1239