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-hdfs-project/hadoop-hdfs-httpfs/src/main/tomcat/ssl-server.xml

@@ -70,7 +70,7 @@
          described in the APR documentation -->
     <Connector port="${httpfs.http.port}" protocol="HTTP/1.1" SSLEnabled="true"
                maxThreads="150" scheme="https" secure="true"
-               clientAuth="false" sslProtocol="TLS"
+               clientAuth="false" sslEnabledProtocols="TLSv1"
                keystoreFile="${httpfs.ssl.keystore.file}"
                keystorePass="${httpfs.ssl.keystore.pass}"/>