8202424: Metaspace: on chunk retirement, use correct lower limit on chunksize when adding blocks to free blocks list Reviewed-by: zgu, coleenp

8202584: de-problem list tools/javac/jvm/VerboseOutTest Reviewed-by: mcimadamore

8202447: Fix unloading_occurred to mean unloading_occurred Summary: nmethod unloading does not need to test for jvmti to set unloading_occurred, nor do we need to clean weak Klasses in metadata if unloading does not occur. Reviewed-by: sspitsyn, rehn