Adding test for Mcast Drop

Change-Id: I6439ef600f59de115ad75f77a3b6e5bb8d90d61e
diff --git a/ofdpa/utils.py b/ofdpa/utils.py
index c5cf95f..ce45065 100644
--- a/ofdpa/utils.py
+++ b/ofdpa/utils.py
@@ -205,6 +205,7 @@
         port_to_out_vlan,
         port_to_src_mac_str,
         port_to_dst_mac_str,
+        port_to_src_ip,
         port_to_src_ip_str,
         Groups
         )
@@ -302,6 +303,7 @@
         port_to_out_vlan,
         port_to_src_mac_str,
         port_to_dst_mac_str,
+        port_to_src_ip,
         port_to_src_ip_str,
         port_to_intf_src_mac_str,
         Groups