L2-FIB:add mac learn events test

fixes an issue where events were not sent if BD doesn't enable  mac aging

Change-Id: Iddc53cb5c45e560633e6c5cff2731dccfc70ad5b
Signed-off-by: Eyal Bari <ebari@cisco.com>
diff --git a/test/vpp_papi_provider.py b/test/vpp_papi_provider.py
index 634dabe..b6759ec 100644
--- a/test/vpp_papi_provider.py
+++ b/test/vpp_papi_provider.py
@@ -431,6 +431,15 @@
                          'address': address,
                          'pid': os.getpid(), })
 
+    def want_macs_learn_events(self, enable_disable=1, scan_delay=0,
+                               max_macs_in_event=0, learn_limit=0):
+        return self.api(self.papi.want_l2_macs_events,
+                        {'enable_disable': enable_disable,
+                         'scan_delay': scan_delay,
+                         'max_macs_in_event': max_macs_in_event,
+                         'learn_limit': learn_limit,
+                         'pid': os.getpid(), })
+
     def l2fib_add_del(self, mac, bd_id, sw_if_index, is_add=1, static_mac=0,
                       filter_mac=0, bvi_mac=0):
         """Create/delete L2 FIB entry.