Adding UTs part-1

Change-Id: I7fdb7751f536d1a616cf2a81b7ef16747d71f692
diff --git a/go.mod b/go.mod
index f2704f9..6440ed7 100755
--- a/go.mod
+++ b/go.mod
@@ -11,6 +11,7 @@
 
 require (
 	github.com/go-redis/redis/v8 v8.11.5
+	github.com/golang/mock v1.4.4
 	github.com/golang/protobuf v1.5.2
 	github.com/google/gopacket v0.0.0-00010101000000-000000000000
 	github.com/gorilla/mux v1.8.0
@@ -19,7 +20,7 @@
 	github.com/opencord/voltha-lib-go/v7 v7.2.1
 	github.com/opencord/voltha-protos/v5 v5.2.4
 	github.com/sirupsen/logrus v1.8.1 // indirect
-	github.com/stretchr/testify v1.7.1 // indirect
+	github.com/stretchr/testify v1.8.2
 	go.uber.org/atomic v1.9.0
 	google.golang.org/grpc v1.44.0
 )