Add NETCONF notification for ONU activation and Kafka client to receive events, update dependencies

Change-Id: I5f768fa8077ef7c64e00a534744ca47492344935
diff --git a/.golangci.yml b/.golangci.yml
index 40a7fb0..349f1c1 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -21,5 +21,10 @@
     #- gochecknoinits
     #- gocritic
     - gofmt
+    - errcheck
     #- golint
     #- unparam
+
+issues:
+  exclude:
+    - "Package github.com/golang/protobuf/proto is deprecated"
\ No newline at end of file