Make ARP_CMD local

Change-Id: Iaa540f7685197a17f1db4c3351373a6d77a80105

Author: sc68cal

lib/neutron-legacy

@@ -621,14 +621,13 @@ function _move_neutron_addresses_route {
         DEFAULT_ROUTE_GW=$(ip -f $af r | awk "/default.+$from_intf/ { print \$3; exit }")
         local ADD_OVS_PORT=""
         local DEL_OVS_PORT=""
+        local ARP_CMD=""
 
         IP_BRD=$(ip -f $af a s dev $from_intf scope global primary | grep inet | awk '{ print $2, $3, $4; exit }')
 
         if [[ "$af" == "inet" ]]; then
             IP=$(echo $IP_BRD | awk '{ print $1; exit }' | grep -o -E '(.*)/' | cut -d "/" -f1)
             ARP_CMD="arping -A -c 3 -w 4.5 -I $to_intf $IP "
-        else
-            ARP_CMD=""
         fi
 
         if [ "$DEFAULT_ROUTE_GW" != "" ]; then