8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
Summary: Include metaspace information (used, allocated, reserved) in the PrintGCDetails output for full GCs.
Reviewed-by: poonam, jmasa, brutisso

Summary: Improve the output of G1PrintRegionLivenessInfo by adding a per-region remembered set size information column
Reviewed-by: jwilhelm, johnc

Summary: Refactored shrink_by() to only use region counts and not byte sizes
Reviewed-by: johnc, tschatzl

Summary: Make sure max alignemnt is at least as large as min alignment
Reviewed-by: johnc, jmasa, tschatzl