Rename policy capabilities

Summary: Ref T5655. Rename `PhabricatorPolicyCapability` subclasses for consistency.

Test Plan: Browsed a few applications, nothing seemed broken.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin, hach-que

Maniphest Tasks: T5655

Differential Revision: https://secure.phabricator.com/D10037

src/applications/diffusion/controller/DiffusionRepositoryNewController.php

@@ -1,14 +1,13 @@
 <?php
 
-final class DiffusionRepositoryNewController
-  extends DiffusionController {
+final class DiffusionRepositoryNewController extends DiffusionController {
 
   public function processRequest() {
     $request = $this->getRequest();
     $viewer = $request->getUser();
 
     $this->requireApplicationCapability(
-      DiffusionCapabilityCreateRepositories::CAPABILITY);
+      DiffusionCreateRepositoriesCapability::CAPABILITY);
 
     if ($request->isFormPost()) {
       if ($request->getStr('type')) {