Ignore ARP flow while counting subscriber flows for DT workflow.

Change-Id: I646b8df6d4ef4ec0a9cf4275000db80f15cd435f
diff --git a/libraries/onos.robot b/libraries/onos.robot
index 4a0413e..b242e19 100755
--- a/libraries/onos.robot
+++ b/libraries/onos.robot
@@ -255,7 +255,7 @@
     [Arguments]    ${ip}    ${port}    ${olt_of_id}    ${expected_flows}
     [Documentation]    Matches for total number of subscriber access flows added for all onus
     ${access_flows_added}=    Execute ONOS CLI Command    ${ip}    ${port}
-    ...    flows -s ADDED ${olt_of_id} | grep -v deviceId | grep -v ETH_TYPE:lldp | wc -l
+    ...    flows -s ADDED ${olt_of_id} | grep -v deviceId | grep -v ETH_TYPE:lldp | grep -v ETH_TYPE:arp | wc -l
     Should Be Equal As Integers    ${access_flows_added}    ${expected_flows}
 
 Get Programmed Subscribers