[PATCH FOR REVIEW] 7194035: update tests for upcoming changes for jtreg

[Jonathan Gibbons]

> Jon - does ${TESTCLASSPATH:-${TESTCLASSES}} need to use $PS so that the
> path separate is correct on Windows?
>
> -Alan.

Alan,

The expression as written does not need $PS because the syntax
being used is   ${A:-${B}}  where the :- is shell syntax for providing
a default if not set.  If I had suggested ${A}:${B} then $PS would
be more appropriate.

-- Jon