fixed few issues after testing

components/extensions/pull-notification-listeners/org.wso2.carbon.device.mgt.mqtt.notification.listener/src/main/java/org/wso2/carbon/device/mgt/mqtt/notification/listener/DeviceTypeOperationAdapterSubscription.java

@@ -49,7 +49,7 @@ public class DeviceTypeOperationAdapterSubscription implements InputEventAdapter
                     getThreadLocalCarbonContext().getUserRealm().getRealmConfiguration().getAdminUserName());
             deviceType = notificationMessage.getDeviceIdentifier().getType();
             MqttNotificationDataHolder.getInstance().getDeviceManagementProviderService().
-                    updatePullNotificationOperation(notificationMessage.getDeviceIdentifier(),
+                    notifyPullNotificationSubscriber(notificationMessage.getDeviceIdentifier(),
                                                      notificationMessage.getOperation());
         } catch (UserStoreException e) {
             log.error("Failed to retrieve tenant username", e);