Expose off-heap memory usage stats

patch by Benjamin Lerer; reviewed by Aleksey Yeschenko for
CASSANDRA-7897
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/io/sstable/SSTableReader.java
	src/java/org/apache/cassandra/tools/NodeCmd.java
	src/java/org/apache/cassandra/utils/IFilter.java
	src/java/org/apache/cassandra/utils/obs/IBitSet.java
Merge branch 'cassandra-2.1' into trunk
Fix CQLTester

patch by snazy; reviewed by blerer for CASSANDRA-8392
use parameterized logging
don't declare throwing exceptions that aren't
use try-with-resources
Fixed typo

Patch by davedamoon; reviewed by marcuse for CASSANDRA-8395
Merge branch 'cassandra-2.1' into trunk
Increase quarantine on replacement

Patch by brandonwilliams, reviewed by jasobrown for CASSANDRA-8260
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1' into trunk
Ninja-add missing consistency levels to cqlsh
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Workaround for output name restriction when using MultipleOutputs with CqlBulkOutputFormat

Patch by Paul Pak, reviewed by Piotr Kołaczkowski for CASSANDRA-7827
Fix undeclared throwable exception while executing 'nodetool netstats localhost'

Patch by Vishal Mehta and Carl Yeksigian, reviewed by Carl Yeksigian for
CASSANDRA-8122
Merge branch 'cassandra-2.0' into cassandra-2.1
Fix undeclared throwable exception while executing 'nodetool netstats localhost'

Patch by Vishal Mehta and Carl Yeksigian, reviewed by Carl Yeksigian for CASSANDRA-8122
Merge branch 'cassandra-2.1' into trunk