Add .classpath, .project and .settings to svn:ignore.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1559700 13f79535-47bb-0310-9956-ffa450edef68
svn merge -c 1559701 from trunk for HDFS-5800. Fix a typo in DFSClient.renewLease().


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1559702 13f79535-47bb-0310-9956-ffa450edef68