8180755: Remove use of bitMap.inline.hpp include from instanceKlass.hpp and c1_ValueSet.hpp
Reviewed-by: ehelin, coleenp, dholmes

8147918: Rename develop_log_is_enabled() to log_develop_is_enabled()
Reviewed-by: dholmes, brutisso

8145092: Use Unified Logging for the GC logging
Summary: JEP-271. VM changes contributed by brutisso, test changes contributed by david.
Reviewed-by: sjohanss, david, brutisso
Contributed-by: bengt.rutisson@oracle.com, david.lindholm@oralce.com

8140424: don't prefix developer and notproduct flag variables with CONST_ in product builds
Reviewed-by: goetz, stefank

8081382: Make flags ParallelGCThreads and ConcGCThreads of type uint
Reviewed-by: drwhite, stefank

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