Java Thread migration

[Zhengyu Gu]

I ran a round of SPECjbb2015 tests on to-gc1, with/without NUMA auto-balancing with different GC options.
The result is quite interesting: NUMA auto-balancing apparently hurts Shenandoah and increases thread migration
in general.

Result: http://cr.openjdk.java.net/~zgu/shenandoah/thread-migrations.html

Thanks,

-Zhengyu