HDFS-7274. Disable SSLv3 in HttpFS. (Robert Kanter via kasha)

(cherry picked from commit 3f48493bed22f9618a9330deaaaa070734989814)

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

(cherry picked from commit c0b17bf10467a890982863758746ed471e43c0ae)

Conflicts:
	hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
HADOOP-11243. SSLFactory shouldn't allow SSLv3. (Wei Yan via kasha)

(cherry picked from commit 3c5f5af1184e85158dec962df0b0bc2be8d0d1e3)
(cherry picked from commit d8212c0b7e3d6873a18cdb94b1ac6ab6cf2c0fd2)
HADOOP-11260. Patch up Jetty to disable SSLv3. (Mike Yoder via kasha)

(cherry picked from commit dbf30e3c0e1522e6588aecac71c990c0b01fd8fb)
(cherry picked from commit c7b3356bfbd3a175337f0c347f35630cb8c78f31)

Conflicts:
	hadoop-common-project/hadoop-kms/src/test/java/org/apache/hadoop/crypto/key/kms/server/MiniKMS.java
Add 2.5.2 to CHANGES.txt
Preparing for 2.5.3 development