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/xeipuuv/gojsonschema/jsonLoader.go

@@ -38,6 +38,7 @@ import (
 	"runtime"
 	"strings"
 
+
 	"github.com/xeipuuv/gojsonreference"
 )
 
@@ -101,7 +102,9 @@ func (l *jsonReferenceLoader) JsonReference() (gojsonreference.JsonReference, er
 }
 
 func (l *jsonReferenceLoader) LoaderFactory() JSONLoaderFactory {
-	return &DefaultJSONLoaderFactory{}
+	return &FileSystemJSONLoaderFactory{
+		fs: l.fs,
+	}
 }
 
 // NewReferenceLoader returns a JSON reference loader using the given source and the local OS file system.
@@ -173,7 +176,7 @@ func (l *jsonReferenceLoader) loadFromHTTP(address string) (interface{}, error)
 
 	// must return HTTP Status 200 OK
 	if resp.StatusCode != http.StatusOK {
-		return nil, errors.New(formatErrorDescription(Locale.httpBadStatus(), ErrorDetails{"status": resp.Status}))
+		return nil, errors.New(formatErrorDescription(Locale.HttpBadStatus(), ErrorDetails{"status": resp.Status}))
 	}
 
 	bodyBuff, err := ioutil.ReadAll(resp.Body)
@@ -291,6 +294,36 @@ func (l *jsonGoLoader) LoadJSON() (interface{}, error) {
 
 }
 
+type jsonIOLoader struct {
+	buf *bytes.Buffer
+}
+
+func NewReaderLoader(source io.Reader) (*jsonIOLoader, io.Reader) {
+	buf := &bytes.Buffer{}
+	return &jsonIOLoader{buf: buf}, io.TeeReader(source, buf)
+}
+
+func NewWriterLoader(source io.Writer) (*jsonIOLoader, io.Writer) {
+	buf := &bytes.Buffer{}
+	return &jsonIOLoader{buf: buf}, io.MultiWriter(source, buf)
+}
+
+func (l *jsonIOLoader) JsonSource() interface{} {
+	return l.buf.String()
+}
+
+func (l *jsonIOLoader) LoadJSON() (interface{}, error) {
+	return decodeJsonUsingNumber(l.buf)
+}
+
+func (l *jsonIOLoader) JsonReference() (gojsonreference.JsonReference, error) {
+	return gojsonreference.NewJsonReference("#")
+}
+
+func (l *jsonIOLoader) LoaderFactory() JSONLoaderFactory {
+	return &DefaultJSONLoaderFactory{}
+}
+
 func decodeJsonUsingNumber(r io.Reader) (interface{}, error) {
 
 	var document interface{}
@@ -302,7 +335,7 @@ func decodeJsonUsingNumber(r io.Reader) (interface{}, error) {
 	if err != nil {
 		return nil, err
 	}
-
+	
 	return document, nil
 
 }