Change "7902090: Update JDK_Version to be more future-proof" breaks some jtreg tests

[Volker Simonis]

Hi Johnathan,

it seems that your change "7902090: Update JDK_Version to be more
future-proof" breaks some jtreg tests. Specifically, all tests which
set "-source 1.9 -target 1.9" for the compile step (e.g.
test/jdk/java/lang/String/concat/ImplicitStringConcatArgCount.java
) will fail with a null pointer exception:

----------Stack trace:(9/649)----------
java.lang.NullPointerException
        at com.sun.javatest.regtest.exec.CompileAction.isModuleOptionsAllowed(CompileAction.java:525)
        at com.sun.javatest.regtest.exec.CompileAction.getJavacCommandArgs(CompileAction.java:469)
        at com.sun.javatest.regtest.exec.CompileAction.run(CompileAction.java:357)
        at com.sun.javatest.regtest.exec.RegressionScript.run(RegressionScript.java:247)
        at com.sun.javatest.Script.run(Script.java:241)
        at com.sun.javatest.DefaultTestRunner.runTest(DefaultTestRunner.java:174)
        at com.sun.javatest.DefaultTestRunner.access$100(DefaultTestRunner.java:43)
        at com.sun.javatest.DefaultTestRunner$1.run(DefaultTestRunner.java:66)
result: Not run. Test running...

So the new behavior doesn't really seem to be more "future-proof" :)

Do you plan to fix this in jtreg or do you want to change all the
jtreg tests which use "1.9"  to use "9" instead? I personally think
that at least as long as "javac" supports both notations, jtreg should
support them as well.

Thanks,
Volker