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

Change-Id: Iac4cc56f014f49e7d241357f8b7a5f4f3047bedc
diff --git a/omci.go b/omci.go
index 75b1e41..f778382 100644
--- a/omci.go
+++ b/omci.go
@@ -27,7 +27,7 @@
 	"github.com/aead/cmac/aes"
 	"github.com/google/gopacket"
 	"github.com/google/gopacket/layers"
-	me "github.com/opencord/omci-lib-go/generated"
+	me "github.com/opencord/omci-lib-go/v2/generated"
 )
 
 // DeviceIdent identifies the OMCI message format. Currently either baseline or extended.