Request for review 6840152: JVM crashes when heavyweight monitors are used

[Coleen Phillimore]

Summary: Renamed UseHeavyWeightMonitors flag to !UseFastLocking flag and 
turn off biased locking if !UseFastLocking option is requested.

open webrev at http://cr.openjdk.java.net/~coleenp/6840152/
bug link at http://bugs.sun.com/view_bug.do?bug_id=6840152

Tested against specjbb2005.

Thanks,
Coleen