Fix sstableloader unable to connect encrypted node

patch by yukim; reviewed by krummas for CASSANDRA-7585
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	src/java/org/apache/cassandra/config/YamlConfigurationLoader.java
	src/java/org/apache/cassandra/io/sstable/SSTableLoader.java
	src/java/org/apache/cassandra/streaming/ConnectionHandler.java
	src/java/org/apache/cassandra/streaming/StreamPlan.java
	src/java/org/apache/cassandra/streaming/StreamResultFuture.java
	src/java/org/apache/cassandra/streaming/StreamSession.java
	src/java/org/apache/cassandra/tools/BulkLoader.java
	test/unit/org/apache/cassandra/streaming/StreamTransferTaskTest.java