8152113: Remove _last_ditch_collection GC-cause and avoid expanding heap on Metaspace OOM Reviewed-by: brutisso, jwilhelm

Merge

8152104: G1 StringTable cleaning incorrectly logs with the stringdedup tag Reviewed-by: mgerdin, jwilhelm, sjohanss

8152100: Rework and unify the GC phase logging Reviewed-by: sjohanss, jwilhelm

8152086: Remove SpaceMangler::mangle_region logging Reviewed-by: brutisso, tschatzl

8151808: Factor G1 heap sizing code out of the G1CollectorPolicy Reviewed-by: tbenson, jwilhelm

8151637: Move CollectionSetChooser rebuild code into CollectionSetChooser Reviewed-by: jmasa, tschatzl

Merge

8152007: Add the thread to the GCPhase trace events Reviewed-by: tschatzl, brutisso

8027423: Parallel compact GC class unloading measurement includes symbol and string table time Reviewed-by: mgerdin, jmasa

8026720: Remove the unused SpaceManager::mangle_freed_chunks Reviewed-by: mgerdin, tschatzl, vlivanov

Merge

8151085: Change G1 concurrent timer and tracer measuring time Summary: Change measuring time for G1 concurrent phases and reporting heap summary Reviewed-by: brutisso, sjohanss

Merge

8151560: Safepoint logging has mismatch between command line level and printed level Summary: Corrected mistaken "debug" level to "trace" Reviewed-by: hseigel, jiangli, dholmes

8151711: Move G1 number sequences out of the G1 collector policy Reviewed-by: tbenson, ehelin