hg: shenandoah/jdk8u/hotspot: ShenandoahMinRegionSize should be 256K to allow small heaps.

[ashipile at redhat.com]

Changeset: fa1071cc5aee
Author:    shade
Date:      2017-03-03 13:29 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/fa1071cc5aee

ShenandoahMinRegionSize should be 256K to allow small heaps.

! src/share/vm/gc_implementation/shenandoah/shenandoahHeapRegion.cpp
! src/share/vm/gc_implementation/shenandoah/shenandoah_globals.hpp
! test/gc/shenandoah/TestRegionSizeArgs.java