modify arguments of Dispatcher.announce_update

- 'pname' argument is not needed
- change 'modulename' argument to 'moduleobj'
  (needed for further change)

Change-Id: Ib21f8ad06d9b2be4005ff3513088a85e29785c94
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/32744
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

test/test_poller.py

@@ -53,7 +53,7 @@ artime = Time()  # artificial test time
 class DispatcherStub:
     maxcycles = 10
 
-    def announce_update(self, modulename, pname, pobj):
+    def announce_update(self, moduleobj, pobj):
         now = artime.time()
         if hasattr(pobj, 'stat'):
             pobj.stat.append(now)