BM.forceBatchlogReplay() should be executed in batchlogTasks

follow-up to CASSANDRA-6079
remove calculation of unused  expected compacted filesize
Backport CASSANDRA-6196 to 1.2

patch by Mikhail Stepura; reviewed by Aleksey Yeschenko for
CASSANDRA-6196
Fix harmless NPE in MM/HHOM
Patch by brandonwilliams, reviewed by Tyler Hobbs for CASSANDRA-5185
add ticket number to changes
fix a bunch of typos
add windows bat files for shell commands
patch by sdelmas reviewed by dbrosius for CASSANDRA-6145
Use smaller stack size for tests
Avoid stack overflow on RangeTombstoneList insertion

patch by slebresne; reviewed by frousseau for CASSANDRA-6181
Update changelog
Make LOCAL_ONE the default CL for hadoop
Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-6214