VOL-3978 - update to go 1.16.3

Change-Id: Ic58d4344cc98c8f4ce0a7b6a0bb538605750afe9
diff --git a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/kafka/client.go b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/kafka/client.go
index 0337432..eee9631 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/kafka/client.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/kafka/client.go
@@ -17,8 +17,9 @@
 
 import (
 	"context"
-	ca "github.com/opencord/voltha-protos/v4/go/inter_container"
 	"time"
+
+	ca "github.com/opencord/voltha-protos/v4/go/inter_container"
 )
 
 const (
@@ -37,9 +38,7 @@
 )
 
 const (
-	DefaultKafkaHost                = "127.0.0.1"
-	DefaultKafkaPort                = 9092
-	DefaultKafkaAddress             = DefaultKafkaHost + ":" + string(DefaultKafkaPort)
+	DefaultKafkaAddress             = "127.0.0.1:9092"
 	DefaultGroupName                = "voltha"
 	DefaultSleepOnError             = 1
 	DefaultProducerFlushFrequency   = 10
diff --git a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/log/log.go b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/log/log.go
index b8d498c..7b1a123 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/log/log.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/log/log.go
@@ -54,11 +54,12 @@
 	"context"
 	"errors"
 	"fmt"
-	zp "go.uber.org/zap"
-	zc "go.uber.org/zap/zapcore"
 	"path"
 	"runtime"
 	"strings"
+
+	zp "go.uber.org/zap"
+	zc "go.uber.org/zap/zapcore"
 )
 
 type LogLevel int8
@@ -217,7 +218,7 @@
 	case FatalLevel:
 		return "FATAL", nil
 	}
-	return "", errors.New("Given LogLevel is invalid " + string(l))
+	return "", fmt.Errorf("Given LogLevel is invalid %d", l)
 }
 
 func getDefaultConfig(outputType string, level LogLevel, defaultFields Fields) zp.Config {