do batched hydration for GET /api/meta/db/. Save a few DB calls

resources/frontend_client/app/admin/datasets/partials/dataset_list.html

@@ -4,8 +4,7 @@
             <div class="float-right">
                 <a class="Button Button--primary" ng-click="syncDatabase(db.id)">Re-Sync Database</a>
             </div>
-                    <h2>{{db.name}}</h2>
-
+            <h2>{{db.name}}</h2>
         </div>
         <ul>
             <li class="py2 border-bottom" ng-repeat="table in db.tables">

src/metabase/api/meta/db.clj

@@ -10,7 +10,7 @@
                              [hydrate :refer [hydrate simple-batched-hydrate]]
                              [database :refer [Database]]
                              [field :refer [Field]]
-                             [org :refer [org-can-read org-can-write]]
+                             [org :refer [Org org-can-read org-can-write]]
                              [table :refer [Table]])
             [metabase.util :as u]))
 
@@ -18,7 +18,7 @@
   (require-params org)
   (check-403 (org-can-read org))
   (-> (sel :many Database :organization_id org (order :name))
-      (hydrate :organization)))
+      (simple-batched-hydrate Org :organization_id :organization)))
 
 (defendpoint POST "/" [:as {{:keys [org name engine details] :as body} :body}]
   (require-params org name engine details)