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


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1581000 13f79535-47bb-0310-9956-ffa450edef68
Merge r1580997 from trunk. YARN-1852. Fixed RMAppAttempt to not resend AttemptFailed/AttemptKilled events to already recovered Failed/Killed RMApps. Contributed by Rohith Sharmaks

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1581001 13f79535-47bb-0310-9956-ffa450edef68