RFR(S): [testbug] add @requires vm.cds to CDS tests in jdk test suite

[Lindenmaier, Goetz]

Hi David, 

thanks for looking at my change!

> Should JDK-8185436 have made the changes to TEST.ROOT? I don't
> understand all the changes that have been added there. Did JDK-8185436
> make VMProps.java dependent on WhitBox API but not provide a means to
> actually build VMProps properly??
8185436 did the changes for the hotspot tests. With this change I want to 
exclude tests in the jdk test suite. When I did 8185436 there was no need
to add these lines in the jdk test suite (as now I will not add it in jaxp/test etc.)
because the @requires in the jdk/test suite did not yet use anything from 
VMProps.java.

When I did 8185436 I was asked by Mikhailo Seledtsov to use the @requires functionality.
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2017-July/024072.html

As I understand, the three lines I added to TEST.ROOT, which are just copied from 
hotspot/test/TEST.ROOT, tell jtreg how to compile VMProps.java which is needed
to evaluate the @requires statements. 

> I think the TEST.ROOT change may need wider review than serviceability-dev.
Where should I post it to?

Best regards,
  Goetz.


> 
> Thanks,
> David
> 
> > Best regards,
> >   Goetz.
> >