This is test only change to fix a few tests that don't have complete
@modules or --add-exports options and so fail when running jtreg with
vmoption:--illegal-access=deny.
The only change that might not be obvious is to
langtools/tools/javac/platform/CanHandleClassFilesTest.java. That test
creates a custom class loader to load the CreateSymbols tool from the
make tree. jtreg doesn't know how to export packages to the unnamed
module of custom class loaders so the test is changed to open the
packages to the test and then pass on the rights to the unnamed module
of the custom class loader.
http://cr.openjdk.java.net/~alanb/8215449/webrev/index.html
-Alan
