HADOOP-11217. Disable SSLv3 in KMS. (Robert Kanter via kasha)

(cherry picked from commit 1a780823384a9c4289b8bb0b3c73e6b886d78fd0)
HDFS-7274. Disable SSLv3 in HttpFS. (Robert Kanter via kasha)

(cherry picked from commit 3f48493bed22f9618a9330deaaaa070734989814)

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
YARN-2503. Added node lablels in web UI. Contributed by Wangda Tan
(cherry picked from commit d5e0a09721a5156fa2ee51ac1c32fbfd9905b8fb)
(cherry picked from commit 720de7eb4ca310e8d800938fbb56fd4de06fc6a5)
HADOOP-11243. SSLFactory shouldn't allow SSLv3. (Wei Yan via kasha)

(cherry picked from commit 3c5f5af1184e85158dec962df0b0bc2be8d0d1e3)