core: move module handling out of dispatcher

Split module handling code from the dispatcher.
The new class for managing Modules is called SecNode.

* change logging to no longer need a reference to modobj
* modules get a reference to the secnode obj instead of the
  dispatcher
* intermediate usage fixes for frappy_psi/sea

Change-Id: Ifee4bb47aa7a4508bb4a47c9a5873b7e2d5faf67
Reviewed-on: https://forge.frm2.tum.de/review/c/secop/frappy/+/32249
Reviewed-by: Alexander Zaft <a.zaft@fz-juelich.de>
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>

test/test_attach.py

@@ -57,11 +57,23 @@ class LoggerStub:
 logger = LoggerStub()
 
 
+class SecNodeStub:
+    def __init__(self):
+        self.modules = {}
+
+    def add_module(self, module, modname):
+        self.modules[modname] = module
+
+    def get_module(self, modname):
+        return self.modules[modname]
+
+
 class ServerStub:
     restart = None
     shutdown = None
 
     def __init__(self):
+        self.secnode = SecNodeStub()
         self.dispatcher = Dispatcher('dispatcher', logger, {}, self)
 
 
@@ -73,6 +85,6 @@ def test_attach():
     a = Module('a', logger, {'description': ''}, srv)
     m = Mod('m', logger, {'description': '', 'att': 'a'}, srv)
     assert m.propertyValues['att'] == 'a'
-    srv.dispatcher.register_module(a, 'a')
-    srv.dispatcher.register_module(m, 'm')
+    srv.secnode.add_module(a, 'a')
+    srv.secnode.add_module(m, 'm')
     assert m.att == a