HADOOP-11217. (Addendum to allow SSLv2Hello) Disable SSLv3 in KMS. (Robert Kanter via kasha)

(cherry picked from commit 87818ef4e7c1a49dc3b0d6766cceb3499b07b837)
HDFS-7391. Renable SSLv2Hello in HttpFS. Contributed by Robert Kanter.

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt