Update vendoring + fix issue with timestamps being added to log

As per the vendoring here:
https://github.com/kubernetes-incubator/kompose/commit/e9544ca89477ed76bd75f1160f9a89686f75e95d
for some odd issue, text_formatter.go in the logrus package was updated
to an older file.

This commit updates the vendoring as well as specifies a specific
version for logrus to be used.

Closes + fixes
https://github.com/kubernetes-incubator/kompose/issues/532

vendor/github.com/spf13/pflag/string_slice.go

@@ -3,12 +3,9 @@ package pflag
 import (
 	"bytes"
 	"encoding/csv"
-	"fmt"
 	"strings"
 )
 
-var _ = fmt.Fprint
-
 // -- stringSlice Value
 type stringSliceValue struct {
 	value   *[]string
@@ -39,7 +36,7 @@ func writeAsCSV(vals []string) (string, error) {
 		return "", err
 	}
 	w.Flush()
-	return strings.TrimSuffix(b.String(), fmt.Sprintln()), nil
+	return strings.TrimSuffix(b.String(), "\n"), nil
 }
 
 func (s *stringSliceValue) Set(val string) error {