Convert simple query subclasses to use internal cursors

Summary:
Depends on D20291. Ref T13259. Move all the simple cases (where paging depends only on the partial object and does not depend on keys) to a simple wrapper.

This leaves a smaller set of more complex cases where we care about external data or which keys were requested that I'll convert in followups.

Test Plan: Poked at things, but a lot of stuff is still broken until everything is converted.

Reviewers: amckinley

Reviewed By: amckinley

Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam

Maniphest Tasks: T13259

Differential Revision: https://secure.phabricator.com/D20292

src/applications/project/query/PhabricatorProjectQuery.php

@@ -201,12 +201,11 @@ final class PhabricatorProjectQuery
     );
   }
 
-  protected function getPagingValueMap($cursor, array $keys) {
-    $project = $this->loadCursorObject($cursor);
+  protected function newPagingMapFromPartialObject($object) {
     return array(
-      'id' => $project->getID(),
-      'name' => $project->getName(),
-      'status' => $project->getStatus(),
+      'id' => (int)$object->getID(),
+      'name' => $object->getName(),
+      'status' => $object->getStatus(),
     );
   }