RFR (xxs): jdk.jshell.TaskFactory code for java.specification.version = 1.9 should be adjusted for Verona

[Iris Clark]

Hi, Robert and Kumar.

Please review this two character diff to address the following bug:

    8141104: jdk.jshell.TaskFactory code for java.specification.version = 1.9
        should be adjusted for Verona
    https://bugs.openjdk.java.net/browse/JDK-8141104

JEP 223 New Version-String Specification [0] (aka Verona) changes the return
Value for various system properties including java.specification.version. The
code in jdk.jshell.TaskFactory should be altered to detect the new version ("9"
instead of "1.9") as follows:

$ hg diff
diff -r ac125016e012 src/jdk.jshell/share/classes/jdk/jshell/TaskFactory.java
--- a/src/jdk.jshell/share/classes/jdk/jshell/TaskFactory.java  Mon Nov 16 17:10:23 2015 -0800
+++ b/src/jdk.jshell/share/classes/jdk/jshell/TaskFactory.java  Wed Nov 18 12:11:08 2015 -0800
@@ -80,7 +80,7 @@
         if (compiler == null) {
             throw new UnsupportedOperationException("Compiler not available, must be run with full JDK 9.");
         }
-        if (!System.getProperty("java.specification.version").equals("1.9"))  {
+        if (!System.getProperty("java.specification.version").equals("9"))  {
             throw new UnsupportedOperationException("Wrong compiler, must be run with full JDK 9.");
         }
         this.fileManager = new MemoryFileManager(

This bug was detected by jdk/jshell/AnalysisTest.java which fails on all
platforms.  I have confirmed that it passes when this changeset is applied.

After review, the changeset will be pushed to verona/stage [1].  The changeset
will go to jdk9/jdk9 when Verona is pushed to that release.

Thanks,
Iris

[0] http://openjdk.java.net/jeps/223
[1] http://hg.openjdk.java.net/verona/stage