Hadoop 2.8.2 release

Release candidate - 2.8.2-RC1

Fix javac, javadoc and checkstyle issues before branch-2 merge.

YARN-7063. TestTimelineReaderWebServicesHBaseStorage fails with NoCla…

…ssDefFoundError on TSv2 branch2. (Varun Saxena via Haibo Chen)

Hadoop 3.0.0-beta1 release

Release candidate - 3.0.0-beta1-RC0

Hadoop 2.7.4 release

Release candidate - 2.8.2-RC0

YARN-6905. Addendum to fix TestTimelineReaderWebServicesHBaseStorage …

…due to missing FastNumberFormat

(cherry picked from commit e52f26e)

Made fixes for whitespace errors and checstyle warnings before merge.