Rejigger exception handling in standalone realtime

- Throw FormattedExceptions on null or unparseable timestamps
- Throw away events (and increment thrownAway) on non-FormattedExceptions in the fire chief

fix bug where the curator config name was changed in one place but not another; make some info msgs into debug msgs; fix zkworker serialization

make RTR idempotent to multiple run requests for same task, because higher level things in the indexing service require this behaviour

1) Fix HadoopDruidIndexerConfig to no longer replace ":" with "_" on the segmentOutputDir.  The segmentOutputDir is user-supplied so they should have the ability to just not set a bad directory.

Remove retry logic out of the Remote Task Runner and introduce Task resources

add the ability to unmap mmapped files