[8u] RFR: JDK-8261867: Backport relevant test changes & additions from JDK-8130125

[Andrew Hughes]

Bugs: https://bugs.openjdk.java.net/browse/JDK-8261867
      https://bugs.openjdk.java.net/browse/JDK-8130125
Webrev: https://cr.openjdk.java.net/~andrew/openjdk8/8261867/webrev.01/

The main focus of JDK-8130125 is irrelevant to 8u, as it concerns the
introduction of the module system. However, the change was also used
to introduce a number of other test changes and open up three tests
[0]. Backporting these tests will increase test coverage in 8u
and ease the backport of JDK-8159690..

The webrev above includes a subset of the changes from JDK-8130125,
suitable for 8u.

[0] https://mail.openjdk.java.net/pipermail/awt-dev/2015-July/009588.html

Thanks,
-- 
Andrew :)

Senior Free Java Software Engineer
OpenJDK Package Owner
Red Hat, Inc. (http://www.redhat.com)

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