Update Config app for handleRequest

Summary: Update all found callsites in Config.

Test Plan: Check setup issues, databases, edit a value, remove a warning, everything I could click on.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: epriestley, Korvin

Maniphest Tasks: T8628

Differential Revision: https://secure.phabricator.com/D13727

src/applications/config/controller/PhabricatorConfigAllController.php

@@ -3,9 +3,8 @@
 final class PhabricatorConfigAllController
   extends PhabricatorConfigController {
 
-  public function processRequest() {
-    $request = $this->getRequest();
-    $user = $request->getUser();
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
 
     $db_values = id(new PhabricatorConfigEntry())
       ->loadAllWhere('namespace = %s', 'default');