Minor bug fix that prevented ONU moving initial-mib-downloaded state

Change-Id: I100c84c1f516e696fd2725a432c66c0b434991b6
diff --git a/python/adapters/brcm_openomci_onu/omci/brcm_mib_download_task.py b/python/adapters/brcm_openomci_onu/omci/brcm_mib_download_task.py
index a3fcc47..06688f4 100644
--- a/python/adapters/brcm_openomci_onu/omci/brcm_mib_download_task.py
+++ b/python/adapters/brcm_openomci_onu/omci/brcm_mib_download_task.py
@@ -327,7 +327,7 @@
             frame = msg.set()
             self.log.debug('openomci-msg', omci_msg=msg)
             self.strobe_watchdog()
-            results = yield self._device.omci_cc.send(frame)
+            results = yield omci_cc.send(frame)
             self.check_status_and_state(results, 'set-extended-vlan-tagging-operation-configuration-data')
 
         except TimeoutError as e: