Fix TokenMetadataTest
Fix ScrubTest
Fix LeaveAndBootstrapTest
Fix potential ConcurrentModificationException in tests
change MIN_SANE_LIVE_RATIO logging to debug
patch by jbellis for CASSANDRA-5377
Bump Xss to 256k to match 2.0+ (CASSANDRA-5517)
Update versions, licenses for 1.2.12 release
update pig example scripts
Patch by Jeremy Hanna, reviewed by brandonwilliams for CASSANDRA-6239
Optimize FD phi calculation
patch by jbellis; reviewed by brandonwilliams for CASSANDRA-6386
Improve initial FD phi estimate when starting up
patch by jbellis; reviewed by brandonwilliams for CASSANDRA-6385