Fix L2BD arp termination Test Case

Fix L2BD arp termination Test Case

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L2BD arp termination Test Case
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12:02:21,850 Couldn't stat : /tmp/vpp-unittest-TestL2bdArpTerm-_h44qo/stats.sock
L2BD arp term - add 5 hosts, verify arp responses                        OK
L2BD arp term - delete 3 hosts, verify arp responses                     OK
L2BD arp term - recreate BD1, readd 3 hosts, verify arp responses        OK
L2BD arp term - 2 IP4 addrs per host                                     OK
L2BD arp term - create and update 10 IP4-mac pairs                       OK
L2BD arp/ND term - hosts with both ip4/ip6                               OK
L2BD ND term - Add and Del hosts, verify ND replies                      OK
L2BD ND term - Add and update IP+mac, verify ND replies                  OK
L2BD arp term - send garps, verify arp event reports                     OK
L2BD arp term - send duplicate garps, verify suppression                 OK
L2BD arp term - disable ip4 arp events,send garps, verify no events      OK
L2BD ND term - send NS packets verify reports                            OK
L2BD ND term - send duplicate ns, verify suppression                     OK
L2BD ND term - disable ip4 arp events,send ns, verify no events          OK

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TEST RESULTS:
     Scheduled tests: 14
      Executed tests: 14
        Passed tests: 14
==============================================================================

Test run was successful

Change-Id: I6bb1ced11b88080ffaa845d22b0bc471c4f91683
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>