Don't allow marking already compacted sstables as compacting.

Patch by marcuse; reviewed by yukim for CASSANDRA-7145
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.0' into cassandra-2.1.0

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/db/DataTracker.java
	src/java/org/apache/cassandra/db/compaction/LeveledManifest.java
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
remove dead code
Allow triggers' names to be quoted identifiers

patch by Mikhail Stepura; reviewed by Sylvain Lebresne for CASSANDRA-7847
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Allow triggers' names to be quoted identifiers

patch by Mikhail Stepura; reviewed by Sylvain Lebresne for CASSANDRA-7847
Merge branch 'cassandra-2.1' into trunk
Ability to freeze UDT

patch by slebresne; reviewed by iamaleksey for CASSANDRA-7857
remove shuffle again
Merge branch 'cassandra-2.1.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1' into trunk