Broker, do not request operator if there is already an available one

dream/simulation/OperatedPoolBroker.py

@@ -122,10 +122,9 @@ class Broker(ObjectInterruption):
                     self.waitForOperator=True
                     self.victim.printTrace(self.victim.id, waitEvent='(resourceIsAvailable broker)')                 
                     
+                    if not self.victim.operatorPool.checkIfResourceIsAvailable():
                         self.expectedSignals['resourceAvailable']=1
-                    
                         yield self.resourceAvailable
-
                         transmitter, eventTime=self.resourceAvailable.value
                         self.resourceAvailable=self.env.event()
                         self.waitForOperator=False