hg: shenandoah/jdk: Integrate Shenandoah tests to upstream test groups

[zgu at redhat.com]

Changeset: 7bb605c7950d
Author:    zgu
Date:      2018-10-15 20:06 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/7bb605c7950d

Integrate Shenandoah tests to upstream test groups

! test/hotspot/jtreg/TEST.groups