hg: shenandoah/jdk: Should cleanup previous/bad versions of redefined classes during full gc

[zgu at redhat.com]

Changeset: de3116a7c4e0
Author:    zgu
Date:      2018-06-05 14:55 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/de3116a7c4e0

Should cleanup previous/bad versions of redefined classes during full gc

! src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp
! test/hotspot/jtreg/TEST.groups
! test/hotspot/jtreg/runtime/Metaspace/DefineClass.java