8148940: java/lang/ref/FinalizeOverride.java can time out due to frequent safepointing
Summary: Reduce the freqency of triggering GCs by sleeping between GCs.
Reviewed-by: thartmann, shade
8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
Reviewed-by: psandoz, kvn, jrose, adinn, simonis, coleenp