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/PhabricatorConfigGroupController.php

@@ -3,18 +3,12 @@
 final class PhabricatorConfigGroupController
   extends PhabricatorConfigController {
 
-  private $groupKey;
-
-  public function willProcessRequest(array $data) {
-    $this->groupKey = $data['key'];
-  }
-
-  public function processRequest() {
-    $request = $this->getRequest();
-    $user = $request->getUser();
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $request->getViewer();
+    $group_key = $request->getURIData('key');
 
     $groups = PhabricatorApplicationConfigOptions::loadAll();
-    $options = idx($groups, $this->groupKey);
+    $options = idx($groups, $group_key);
     if (!$options) {
       return new Aphront404Response();
     }