TEZ-88. Containers launched with HADOOP_ROOT_LOGGER set to 'INFO\,CLA'. (hitesh)

git-svn-id: https://svn.apache.org/repos/asf/incubator/tez/branches/TEZ-1@1476449 13f79535-47bb-0310-9956-ffa450edef68
TEZ-89. Add MRR example job.

git-svn-id: https://svn.apache.org/repos/asf/incubator/tez/branches/TEZ-1@1476450 13f79535-47bb-0310-9956-ffa450edef68
TEZ-89. Add MRR example job.

git-svn-id: https://svn.apache.org/repos/asf/incubator/tez/branches/TEZ-1@1476451 13f79535-47bb-0310-9956-ffa450edef68