RFR(S): 8141424: [Testbug] CompilerDirectivesDCMDTest.java testing flag that is missing in product builds

[Nils Eliasson]

Hi,

Please review.

Problem:
JDK-8140239 Made the IGVPrintLevel flag not_product but forgot to fix 
the tests accordingly.

Summary:
Removing the IGVPrintLevel flag from the test and adding another flag 
that tests int type flags.

bug: https://bugs.openjdk.java.net/browse/JDK-8141424
webrev: http://cr.openjdk.java.net/~neliasso/8141424/webrev.01/

Regards,
Nils