manager passed as None attribute in Entity

dream/simulation/Entity.py

@@ -53,6 +53,8 @@ class Entity(object):
         #         values to be used in the internal processing of compoundObjects
         self.internal = False       # informs if the entity is being processed internally
         self.isCritical=isCritical          # flag to inform weather the entity is critical -> preemption
+        self.manager=None
+        
     # =======================================================================
     # outputs results to JSON File 
     # =======================================================================