PIG-4030: TestGrunt, TestPigRunner fail after PIG-3892

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1604504 13f79535-47bb-0310-9956-ffa450edef68
PIG-4029: TestMRCompiler is broken after PIG-3874

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1604512 13f79535-47bb-0310-9956-ffa450edef68
PIG-4021: Fix TestHBaseStorage failure after auto local mode change (PIG-3463)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1604513 13f79535-47bb-0310-9956-ffa450edef68
PIG-4031: Provide Counter aggregation for Tez

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1604515 13f79535-47bb-0310-9956-ffa450edef68
PIG-4018: Schema validation fails with UNION ONSCHEMA

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1604517 13f79535-47bb-0310-9956-ffa450edef68