Update vendor dir and Godeps.json with new Godep

vendor/github.com/rackspace/gophercloud/testhelper/fixture/helper.go

@@ -1,31 +0,0 @@
-package fixture
-
-import (
-	"fmt"
-	"net/http"
-	"testing"
-
-	th "github.com/rackspace/gophercloud/testhelper"
-	"github.com/rackspace/gophercloud/testhelper/client"
-)
-
-func SetupHandler(t *testing.T, url, method, requestBody, responseBody string, status int) {
-	th.Mux.HandleFunc(url, func(w http.ResponseWriter, r *http.Request) {
-		th.TestMethod(t, r, method)
-		th.TestHeader(t, r, "X-Auth-Token", client.TokenID)
-
-		if requestBody != "" {
-			th.TestJSONRequest(t, r, requestBody)
-		}
-
-		if responseBody != "" {
-			w.Header().Add("Content-Type", "application/json")
-		}
-
-		w.WriteHeader(status)
-
-		if responseBody != "" {
-			fmt.Fprintf(w, responseBody)
-		}
-	})
-}