[VOL-3638] Updating ONU test to latest keyword arguments

Change-Id: Ic89f882b5d8824e70a232d8f43702bea2ae8a428
diff --git a/tests/openonu-go-adapter/Voltha_ONUTemplateTests.robot b/tests/openonu-go-adapter/Voltha_ONUTemplateTests.robot
index 9dc86d0..422ad02 100755
--- a/tests/openonu-go-adapter/Voltha_ONUTemplateTests.robot
+++ b/tests/openonu-go-adapter/Voltha_ONUTemplateTests.robot
@@ -87,7 +87,10 @@
     Run Keyword If    ${pausebeforecleanup}    Pause Execution    Press OK to continue with clean up!
     Run Keyword If    ${pausebeforecleanup}    Log    Teardown will be continued...    console=yes
     Run Keyword If    ${teardown_device}    Delete All Devices and Verify
-    Wait for Ports in ONOS      ${onos_ssh_connection}  0   BBSM
+    FOR    ${I}    IN RANGE    0    ${num_olts}
+        ${olt_serial_number}=    Set Variable    ${list_olts}[${I}][sn]
+        Wait for Ports in ONOS    ${onos_ssh_connection}    0    ${olt_serial_number}    BBSM
+    END
     # delete etcd MIB Template Data (for repeating test)
     Delete MIB Template Data
     Close ONOS SSH Connection   ${onos_ssh_connection}