PIG-4069: Limit reduce task should start as soon as one map task finishes (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1625989 13f79535-47bb-0310-9956-ffa450edef68
PIG-3507: Pig fails to run in local mode on a Kerberos enabled Hadoop cluster (kellyzly via rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1625997 13f79535-47bb-0310-9956-ffa450edef68
PIG-3838: Organize tez code into subpackages (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1626075 13f79535-47bb-0310-9956-ffa450edef68
PIG-3838: Organize tez code into subpackages (rohini)

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1626077 13f79535-47bb-0310-9956-ffa450edef68