Synchronise build.xml developers list with ASF C* committers

See https://people.apache.org/committers-by-project.html#cassandra and
https://wiki.apache.org/cassandra/Committers
Merge branch 'cassandra-2.1' into trunk

Conflicts:
	build.xml
CASSANDRA-7635, rebase for 2.1
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Fix minor potential leak in sstable2json

patch by blerer; reviewed by slebresne for CASSANDRA-7709
Merge branch 'cassandra-2.0' into cassandra-2.1.0

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/tools/SSTableExport.java
Avoid logging CompactionInterrupted at ERROR
patch by marcuse; reviewed by jbellis for CASSANDRA-7694
merge from 2.0
Merge branch 'cassandra-2.1.0' into cassandra-2.1

Conflicts:
	src/java/org/apache/cassandra/tools/SSTableExport.java
Merge branch 'cassandra-2.1' into trunk
merge from 2.1.0
Merge branch 'cassandra-2.1' into trunk
merge
merge
Fix potential AssertionError with 2ndary indexes

patch by slebresne; reviewed by beobal for CASSANDRA-6612
Merge branch 'cassandra-2.0' into cassandra-2.1.0

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/db/index/AbstractSimplePerColumnSecondaryIndex.java
	src/java/org/apache/cassandra/db/index/SecondaryIndexManager.java
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Fix pig tests.

Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-7570