Fix for subscription verification optionality

OneM2M_Testcases_CSE_Release_3.ttcn

@@ -8748,6 +8748,10 @@ module OneM2M_Testcases_CSE_Release_3 {
 						}
 					}                    
+					if(vc_ae2.running) {
+						vc_ae2.stop;
+					};   
+
 					// Test Body
                     v_contentResponse.notification.notificationForwardingURI := v_fanoutPointAddress;
                     vc_ae2.start(f_cse_notifyProcedure_aggregatedNoficationHandler(v_contentResponse, 1)); // check if the Rx. of notification and match contents