Updated Adapter to support to handle DHCP trap on NNI and packet-in/out and Bug Fixing.
Tested EAPOL/DHCP/HSIA functionality E2E with EdgeCore OLT and TWSH ONU KIT.

patch: PON port is derived from platform and sent to core and bug fixes

Retested EAPOL/DHCP/HSIA use case end to end with EdgeCore OLT and TWSH ONU KIT

Change-Id: I99df82fd7a1385c10878f6fe09ce0d30c48d8e99
diff --git a/vendor/github.com/mdlayher/ethernet/go.sum b/vendor/github.com/mdlayher/ethernet/go.sum
new file mode 100644
index 0000000..9400186
--- /dev/null
+++ b/vendor/github.com/mdlayher/ethernet/go.sum
@@ -0,0 +1,11 @@
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