[SEBA-180] moved onu event in att-workflow driver

Change-Id: Ife28111d46ed8e5a008c61a562d399ee13179838
diff --git a/xos/synchronizer/event_steps/test_dhcp_event.py b/xos/synchronizer/event_steps/test_dhcp_event.py
index 70258a9..a13b2b3 100644
--- a/xos/synchronizer/event_steps/test_dhcp_event.py
+++ b/xos/synchronizer/event_steps/test_dhcp_event.py
@@ -85,7 +85,7 @@
         self.subscriber.onu_device = "BRCM1234"
         self.subscriber.save = Mock()
 
-        self.mac_address = "aa:bb:cc:dd:ee"
+        self.mac_address = "00:AA:00:00:00:01"
         self.ip_address = "192.168.3.5"