Re-think integration vendoring

- remove docker/docker from  Traefik vendor (unused)
- use `ignore` for all Traefik vendor in integration glide.
- defined only integration specific version of the dependencies.

integration/vendor/github.com/Sirupsen/logrus/terminal_windows.go

@@ -3,7 +3,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build windows,!appengine
+// +build windows
 
 package logrus
 
@@ -18,9 +18,9 @@ var (
 	procGetConsoleMode = kernel32.NewProc("GetConsoleMode")
 )
 
-// IsTerminal returns true if stderr's file descriptor is a terminal.
+// IsTerminal returns true if the given file descriptor is a terminal.
 func IsTerminal() bool {
-	fd := syscall.Stderr
+	fd := syscall.Stdout
 	var st uint32
 	r, _, e := syscall.Syscall(procGetConsoleMode.Addr(), 2, uintptr(fd), uintptr(unsafe.Pointer(&st)), 0)
 	return r != 0 && e == 0