Add 'nodetool sethintedhandoffthrottlekb'

patch by lyubent; reviewed by slebresne for CASSANDRA-7635
Merge commit 'd1c4d50ee05cb6be19d60c2e58a19b0e1fb93023' into cassandra-2.1.0
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Fix IncompatibleClassChangeError from hadoop2

Patch by Mariusz Kryński, reviewed by brandonwilliams for CASSANDRA-7229
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1' into trunk
Remove CPRR/CPIF.

Patch by brandonwilliams for CASSANDRA-7570
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/hadoop/cql3/CqlPagingRecordReader.java
Merge branch 'cassandra-2.1' into trunk