RFR: 8202997: Split test/jdk/:tier1 to enable better parallel execution

[Christian Tornqvist]

Please review this small change that splits the test/jdk/:tier1 group into 3 parts to enable us to better execute it in parallel, also fixed the tier2 group to correctly include java/util/Arrays/TimSortStackSize2.java 

Webrev: http://cr.openjdk.java.net/~ctornqvi/webrev/8202997/webrev.00/ <http://cr.openjdk.java.net/~ctornqvi/webrev/8202997/webrev.00/>
Bug: https://bugs.openjdk.java.net/browse/JDK-8202997 <https://bugs.openjdk.java.net/browse/JDK-8202997>

Thanks,
Christian