8065998: Avoid use of _ as a one-character identifier Reviewed-by: alanb, chegar, darcy

8035000: clean up ActivationLibrary.DestroyThread Reviewed-by: lancea

8065552: setAccessible(true) on fields of Class may throw a SecurityException Summary: This fix hides the new private Class.classLoader field from reflection, rather than making it not accessible. Reviewed-by: mchung, coffeys

Merge