VOL-2668 Write separate wpa logs, stricter log check

Change-Id: I0885bb791df348f11b7824a05481251a453333f3
diff --git a/tests/functional/Voltha_FailureScenarios.robot b/tests/functional/Voltha_FailureScenarios.robot
index f9bcfaa..98c243d 100644
--- a/tests/functional/Voltha_FailureScenarios.robot
+++ b/tests/functional/Voltha_FailureScenarios.robot
@@ -206,9 +206,11 @@
         ...    ${onu_device_id}    onu=True    onu_reason=omci-flows-pushed
         Wait Until Keyword Succeeds    ${timeout}    2s    Verify Eapol Flows Added For ONU    ${k8s_node_ip}
         ...    ${ONOS_SSH_PORT}    ${onu_port}
+        ${wpa_log}=    Run Keyword If    ${has_dataplane}    Catenate    SEPARATOR=.
+        ...    /tmp/wpa    ${src['dp_iface_name']}    log
         Run Keyword If    ${has_dataplane}    Run Keyword And Continue On Failure    Validate Authentication    True
         ...    ${src['dp_iface_name']}    wpa_supplicant.conf    ${src['ip']}    ${src['user']}    ${src['pass']}
-        ...    ${src['container_type']}    ${src['container_name']}
+        ...    ${src['container_type']}    ${src['container_name']}    ${wpa_log}
         Wait Until Keyword Succeeds    ${timeout}    2s    Verify ONU in AAA-Users    ${k8s_node_ip}
         ...    ${ONOS_SSH_PORT}     ${onu_port}
     END
@@ -275,9 +277,11 @@
         ...    ${onu_device_id}    onu=True    onu_reason=omci-flows-pushed
         Wait Until Keyword Succeeds    ${timeout}    2s    Verify Eapol Flows Added For ONU    ${k8s_node_ip}
         ...    ${ONOS_SSH_PORT}    ${onu_port}
+        ${wpa_log}=    Run Keyword If    ${has_dataplane}    Catenate    SEPARATOR=.
+        ...    /tmp/wpa    ${src['dp_iface_name']}    log
         Run Keyword If    ${has_dataplane}    Run Keyword And Continue On Failure    Validate Authentication    True
         ...    ${src['dp_iface_name']}    wpa_supplicant.conf    ${src['ip']}    ${src['user']}    ${src['pass']}
-        ...    ${src['container_type']}    ${src['container_name']}
+        ...    ${src['container_type']}    ${src['container_name']}    ${wpa_log}
         Wait Until Keyword Succeeds    ${timeout}    2s    Verify ONU in AAA-Users    ${k8s_node_ip}
         ...    ${ONOS_SSH_PORT}     ${onu_port}
     END