HADOOP-9616. Fix branch-2 javadoc warnings. (Junping Du via llu)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1489951 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
HDFS-4850. Merging change r1490080 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490084 13f79535-47bb-0310-9956-ffa450edef68
Merge -c 1485842 from trunk to branch-2 to fix HADOOP-9593 stack trace printed at ERROR for all yarn clients without hadoop.home set. Contributed by Steve Lougran.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490102 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
HADOOP-8957. Merge r1420965 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490115 13f79535-47bb-0310-9956-ffa450edef68
HDFS-4876. Fix the javadoc of FileWithSnapshot and move FileDiffList to FileWithSnapshot.


git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490117 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9131. Merge r1420366 from trunk.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490118 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-9526. Merge 1490120 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490121 13f79535-47bb-0310-9956-ffa450edef68
HADOOP-8982. Merge 1490124 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490125 13f79535-47bb-0310-9956-ffa450edef68
Merge remote branch 'origin/branch-2' into branch-2-gd
HADOOP-8958. Merge r1415784 from trunk

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1490147 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-7435-branch-2-gd

Conflicts:
	dev-support/test-patch.properties
	hadoop-tools/hadoop-extras/src/main/java/org/apache/hadoop/mapred/tools/package-info.java
	hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/CurrentJHParser.java
	hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/datatypes/util/MapReduceJobPropertiesParser.java
	hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/package-info.java