Fix streaming does not transfer wrapped range

patch by Sergio Bossa; reviewed by yukim for CASSANDRA-5948
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	src/java/org/apache/cassandra/streaming/StreamOut.java
	test/unit/org/apache/cassandra/streaming/StreamingTransferTest.java
Merge branch 'cassandra-2.0' into trunk