[VOL-4290] Voltha go library updates for gRPC migration

Change-Id: I1aa2774beb6b7ed7419bc45aeb53fcae8a8ecda0
diff --git a/vendor/github.com/Shopify/sarama/mockkerberos.go b/vendor/github.com/Shopify/sarama/mockkerberos.go
index affeb2d..a43607e 100644
--- a/vendor/github.com/Shopify/sarama/mockkerberos.go
+++ b/vendor/github.com/Shopify/sarama/mockkerberos.go
@@ -3,11 +3,12 @@
 import (
 	"encoding/binary"
 	"encoding/hex"
-	"gopkg.in/jcmturner/gokrb5.v7/credentials"
-	"gopkg.in/jcmturner/gokrb5.v7/gssapi"
-	"gopkg.in/jcmturner/gokrb5.v7/iana/keyusage"
-	"gopkg.in/jcmturner/gokrb5.v7/messages"
-	"gopkg.in/jcmturner/gokrb5.v7/types"
+
+	"github.com/jcmturner/gokrb5/v8/credentials"
+	"github.com/jcmturner/gokrb5/v8/gssapi"
+	"github.com/jcmturner/gokrb5/v8/iana/keyusage"
+	"github.com/jcmturner/gokrb5/v8/messages"
+	"github.com/jcmturner/gokrb5/v8/types"
 )
 
 type KafkaGSSAPIHandler struct {
@@ -26,7 +27,7 @@
 		return []byte{0x00, 0x00, 0x00, 0x01, 0xAD}
 	}
 
-	var pack = gssapi.WrapToken{
+	pack := gssapi.WrapToken{
 		Flags:     KRB5_USER_AUTH,
 		EC:        12,
 		RRC:       0,
@@ -55,7 +56,6 @@
 }
 
 type MockKerberosClient struct {
-	asReqBytes  string
 	asRepBytes  string
 	ASRep       messages.ASRep
 	credentials *credentials.Credentials
@@ -108,8 +108,9 @@
 func (c *MockKerberosClient) Domain() string {
 	return "EXAMPLE.COM"
 }
+
 func (c *MockKerberosClient) CName() types.PrincipalName {
-	var p = types.PrincipalName{
+	p := types.PrincipalName{
 		NameType: KRB5_USER_AUTH,
 		NameString: []string{
 			"kafka",
@@ -118,6 +119,7 @@
 	}
 	return p
 }
+
 func (c *MockKerberosClient) Destroy() {
 	// Do nothing.
 }