8170468: Convert ParallelCompact_test to GTest
Reviewed-by: dfazunen, iignatyev

8150994: UseParallelGC fails with UseDynamicNumberOfGCThreads with specjbb2005
Reviewed-by: tschatzl, kbarrett

8154743: Internal Error: psParallelCompact.hpp assert(addr >= _region_start) failed: bad addr
Reviewed-by: tschatzl, kbarrett

6787054: Par compact - remove code that clears source_region
Reviewed-by: mgerdin, tschatzl

8146987: Improve Parallel GC Full GC by caching results of live_words_in_range()
Summary: A large part of time in the parallel scavenge collector is spent finding out the amount of live words within memory ranges to find out where to move an object to. Try to incrementally calculate this value.
Reviewed-by: tschatzl, mgerdin, jmasa
Contributed-by: ray alex <sky1young@gmail.com>

8146395: Add inline qualifier in oop.hpp and fix inlining in gc files
Summary: Fix remaining issues after 8146401. Also fix windows VS2010 linkage problem (g1OopClosures.hpp).
Reviewed-by: stefank, mgerdin

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

8138966: Intermittent SEGV running ParallelGC
Summary: Add necessary memory fences so that the parallel threads are unable to observe partially filled block tables.
Reviewed-by: tschatzl

8139277: Remove ScavengeWithObjectsInToSpace, ParallelOldGCSplitALot, ParallelOldGCSplitInterval, PSAdjustTenuredGenForMinorPause and PSAdjustYoungGenForMajorPause
Reviewed-by: tschatzl, sjohanss

8134626: Misc cleanups after generation array removal
Reviewed-by: david, dholmes, tschatzl

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