RFR: 8041331 Cleanup files for jtreg and windows

[Lance Andersen]

Need a reviewer for some additional updates of the SQLException tests I pushed on Friday so that they play nicer WRT clean up on windows with some tools.

Did some minor refactoring as part of this to address some of Roger's earlier comments seeing I had to touch the tests.

The webrev is at http://cr.openjdk.java.net/~lancea/8041331/webrev.00/

Best
Lance


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