RFR: 8024677: [TESTBUG] Move tests for classes in /testlibrary

[Vladimir Kempik]

Hello

Please review this patch.
We've recently backported changes to testlibrary from jdk8 to jdk7 and 
now I want to bring TL tests to jdk7 as well. jdk7u-dev/jdk already has 
these tests, it's only hotspot that missing them.
Its partially backport of 8024677, but I don't remove old files and 
don't edit TEST.groups as these files don't exist in jdk7/hotspot.
I want to push these changes as backport of 8024677 to jdk7/hotspot, but 
since I've removed part of original patch (as mentioned before) I think 
I need to get a review.

Original fix: 
http://hg.openjdk.java.net/jdk8u/jdk8u-dev/hotspot/rev/5b1191bf0b4b
Webrev: http://cr.openjdk.java.net/~vkempik/8024677/webrev.00/

Thanks. Vladimir.