Fix broken tests after reset

Closes #36 (closed)

test/test_core/test_processor.py

+from simudator.core.module import Module
 from simudator.core.processor import Processor
 
 TEST_PATH = "test/test_core/processor_state_test.txt"
 
 
-class Dummymodule:
+class Dummymodule(Module):
     def __init__(self, name):
         self.name = name
         self.string = None
 
-    def load_from_str(self, string):
-        self.string = string
+    def load_from_str(self, state_string):
+        self.string = state_string 
 
     def get_string(self):
         return self.string
 
+    def reset(self):
+        self.string = ""
+
 
 def test_load_from_file():
     cpu = Processor()