PIG-4326: AvroStorageSchemaConversionUtilities does not properly convert schema for maps of arrays of records

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1643872 13f79535-47bb-0310-9956-ffa450edef68
PIG-4350: Port local mode tests to Tez - part2

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1643944 13f79535-47bb-0310-9956-ffa450edef68
PIG-4351: TestPigRunner.simpleTest2 fail on trunk

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1644144 13f79535-47bb-0310-9956-ffa450edef68