Summary: Sync ClassFileInstaller.java with the HotSpot version
Reviewed-by: phh

Summary: fix NPE in test infrastructure
Reviewed-by: ksrini, jfranck, alanb, rfield
Contributed-by: alan.bateman@oracle.com

Summary: Better checking in getEnclosing(Method|Constructor|Class)
Reviewed-by: darcy, ahgross, mchung

Reviewed-by: alanb, rbackman

Reviewed-by: dholmes

Reviewed-by: alanb, michaelm

Reviewed-by: darcy, weijun