8218460: Test generation scripts do not invoke stream preprocessor correctly

[Brian Burkhalter]

https://bugs.openjdk.java.net/browse/JDK-8218460
http://cr.openjdk.java.net/~bpb/8218460/webrev.00/

A full test run will be effected with the generated tests except those generated by

test/jdk/java/lang/invoke/VarHandles/generate-vh-tests.sh

Unfortunately it appears that tests in this folder were modified by manual editing as opposed to modifying the templates and generating the tests via the script. This will be the subject of a linked issue.

Thanks,

Brian