VOL-3978 - change the version of build tools

- fixed two minor errors in code that go 1.16 vet caught

Change-Id: Ibc5d7e966cb89bdb557a640fac70e2101a7b27b6
diff --git a/pkg/log/log.go b/pkg/log/log.go
index b8d498c..7b1a123 100644
--- a/pkg/log/log.go
+++ b/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 {