HDFS-5471. CacheAdmin -listPools fails when user lacks permissions to view all pools (Andrew Wang via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541323 13f79535-47bb-0310-9956-ffa450edef68
HDFS-5450. better API for getting the cached blocks locations. Contributed by Andrew Wang.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541338 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-10093. hadoop-env.cmd sets HADOOP_CLIENT_OPTS with a max heap size that is too small. Contributed by Shanyu Zhao.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1541343 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/trunk' into trunk-gd
Merge remote branch 'origin/trunk-gd' into fb-YAHOO-218-trunk-gd