Revert "Make JUnit classes more compatible with standard JUnit"

This reverts commit 1915347673761fca7ea6f6ac01ebb9411e22f9e9.

This CL breaks libcore testing (and presumably JDWP testing)
on the ART Buildbots (device configurations); see e.g.
https://build.chromium.org/p/client.art/builders/hammerhead-ndebug/builds/6202/steps/test%20libcore/logs/stdio

Change-Id: I62680ca22eec7e641e4f0006e5c530d4219e6995
4 files changed