Bugfix: do not set TESTMODULES environment variable if JDK is not modular

[Jonathan Gibbons]

Mila,

I have pushed a variant of your fix, along with spec updates and tests.
In a related fix, jtreg will now report a warning if the version of the 
compile JDK
does not match the version of the test JDK.

-- Jon


On 12/15/2017 02:37 AM, Miloslav Zezulka wrote:
> This is a very small patch fixing the issue pointed out in $subject. I've
> added checks for both compile and test JDK - is this an overkill, since
> most of the time the implication goes COMPILEJDK.modular =>
> TESTJDK.modular, or a necessary thing to have for foolproofness?
>
> Please let me know what you think.
>
> Thanks,
> Mila