move HADOOP-9435 to branch-2.1.1-beta

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1511919 13f79535-47bb-0310-9956-ffa450edef68
merge r1512026: HADOOP-9833 move slf4j to version 1.7.5

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1512048 13f79535-47bb-0310-9956-ffa450edef68