Update to latest stable jython release (#8667)
Update to latest stable jython release (#8667)

Motivation:

Using the latest jython release fixes some noise that is produced by an exception that is thrown when jython is terminated.

Exception in thread "Jython-Netty-Client-4" Exception in thread "Jython-Netty-Client-7" Exception in thread "Jython-Netty-Client-5" java.lang.NoClassDefFoundError: org/python/netty/util/concurrent/DefaultPromise$2
        at org.python.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:589)
        at org.python.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:397)
        at org.python.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:151)
        at java.lang.Thread.run(Thread.java:748)
Exception in thread "Jython-Netty-Client-8" java.lang.NoClassDefFoundError: org/python/netty/util/concurrent/DefaultPromise$2
        at org.python.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:589)
        at org.python.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:397)
        at org.python.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:151)
        at java.lang.Thread.run(Thread.java:748)
Exception in thread "Jython-Netty-Client-3" java.lang.NoClassDefFoundError: org/python/netty/util/concurrent/DefaultPromise$2
        at org.python.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:589)
        at org.python.netty.util.concurrent.DefaultPromise.setSuccess(DefaultPromise.java:397)%

Modification:

Update to latest stable release.

Result:

Less noise during build.
gerdriesselmann/netty,gerdriesselmann/netty,gerdriesselmann/netty,gerdriesselmann/netty,gerdriesselmann/netty