HADOOP-9355. Abstract Symlink tests to use either FileContext or FileSystem (Andrew Wang via Colin Patrick McCabe)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1496691 13f79535-47bb-0310-9956-ffa450edef68
YARN-874. Making common RPC to switch to not switch to simple when other mechanisms are enabled and thus fix YARN/MR test failures after HADOOP-9421. Contributed by Daryn Sharp and Vinod Kumar Vavilapalli.
svn merge --ignore-ancestry -c 1496692 ../../trunk/


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1496693 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge -c 1496741 from trunk to branch-2 to fix MAPREDUCE-5326. Added version to shuffle header. Contributed by Zhijie Shen.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1496742 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1496751 from trunk to branch-2 to fix YARN-869. Move ResourceManagerAdministrationProtocol out of main YARN api. Contributed by Vinod K V.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1496754 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
Merge branch 'branch-2-gd' of https://github.com/griddynamics/yhadoop-common into fb-HADOOP-9078-branch-2-gd

Conflicts:
	hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/SymlinkBaseTest.java