VOL-3978 - update to go 1.16.3

- lint required re-format of "generaged" files
- tidied up go.mod

Change-Id: I8fbab94b679061a5e9ba05f95a33b2bb4ca9edc4
diff --git a/layers_test.go b/layers_test.go
index f6a43cf..2b99278 100644
--- a/layers_test.go
+++ b/layers_test.go
@@ -17,9 +17,9 @@
 package omci_test
 
 import (
+	"github.com/google/gopacket"
 	"github.com/opencord/omci-lib-go"
 	me "github.com/opencord/omci-lib-go/generated"
-	"github.com/google/gopacket"
 	"github.com/stretchr/testify/assert"
 	"testing"
 )