VOL-1643 Update voltha-lib-go to use voltha-protos v3.0.0

and bump up the version to 3.0.0. voltha-protos is modified to be
compatible with the java language proto compilation. It's a major
change and a major version change has been made.

Change-Id: Ifb93430567ddf96aaa0fbf6e5853aad9e1070f6f
diff --git a/pkg/mocks/kafka_client_test.go b/pkg/mocks/kafka_client_test.go
index f4707f6..e4517cc 100644
--- a/pkg/mocks/kafka_client_test.go
+++ b/pkg/mocks/kafka_client_test.go
@@ -17,18 +17,19 @@
 package mocks
 
 import (
-	"github.com/opencord/voltha-lib-go/v2/pkg/kafka"
-	ic "github.com/opencord/voltha-protos/v2/go/inter_container"
-	"github.com/stretchr/testify/assert"
 	"testing"
 	"time"
+
+	"github.com/opencord/voltha-lib-go/v3/pkg/kafka"
+	ic "github.com/opencord/voltha-protos/v3/go/inter_container"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestKafkaClientImplementsKafkaClientIf(t *testing.T) {
 	client := NewKafkaClient()
 
 	if _, ok := interface{}(client).(kafka.Client); !ok {
-		t.Error("mock kafka client does not implement voltha-lib-go/v2/pkg/kafka/Client interface")
+		t.Error("mock kafka client does not implement voltha-lib-go/v3/pkg/kafka/Client interface")
 	}
 }