HADOOP-9301. hadoop client servlet/jsp/jetty/tomcat JARs creating conflicts in Oozie & HttpFS. (tucu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1457001 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge remote branch 'origin/branch-2-gd' into fb-HADOOP-9016-branch-2-gd