old-tck: applicationSubscribeToEventNPETest contains an error - description of test does not match what the test is doing

[pnicolucci]

https://github.com/jakartaee/faces/blob/master/tck/old-tck/source/src/com/sun/ts/tests/jsf/api/jakarta_faces/application/application/TestServlet.java#L2304

The test documents the following: Running==> application.subscribeToEvent(Class, null, null)

The test performs the following: new Object[] { TCKSystemEvent.class, srcClass, null }, out);

This looks to just be a copy-and-paste error from the test above.

The proposed solution is just to do the following: new Object[] { TCKSystemEvent.class, null, null }, out);

However, I think we should discuss if there is any value in this test at all since null is allowed for a sourceClass and an NPE would be thrown just like the test before this one since the listener is null: https://jakarta.ee/specifications/faces/4.0/apidocs/jakarta/faces/application/application#unsubscribeFromEvent(java.lang.Class,jakarta.faces.event.SystemEventListener)

[pnicolucci]

Merged changes to the 4.1 branch.