move package to v2 version as per go requirements after update to version 2.0

Change-Id: Iac4cc56f014f49e7d241357f8b7a5f4f3047bedc
diff --git a/messagetypes_test.go b/messagetypes_test.go
index a22e7ef..9274f3e 100644
--- a/messagetypes_test.go
+++ b/messagetypes_test.go
@@ -18,8 +18,8 @@
 
 import (
 	"github.com/google/gopacket"
-	. "github.com/opencord/omci-lib-go"
-	me "github.com/opencord/omci-lib-go/generated"
+	. "github.com/opencord/omci-lib-go/v2"
+	me "github.com/opencord/omci-lib-go/v2/generated"
 	"github.com/stretchr/testify/assert"
 	"strings"
 	"testing"