8156500: Move Reference pending list into VM to prevent deadlocks
Summary: Move reference pending list and locking into VM
Reviewed-by: coleenp, dholmes, dcubed, mchung, plevart
Contributed-by: kim.barrett@oracle.com, per.liden@oracle.com

8151601: Cleanup locking of the Reference pending list
Reviewed-by: brutisso, stefank

8139952: Remove UseCMSAdaptiveFreeLists, UseAsyncConcMarkSweepGC, CMSDictionaryChoice, CMSOverflowEarlyRestoration and CMSTestInFreeList
Reviewed-by: jwilhelm, ecaspole

8134953: Make the GC ID available in a central place
Reviewed-by: pliden, jmasa

8079792: GC directory structure cleanup
Reviewed-by: brutisso, stefank, david