implements max holder and validation on UI

src/Bundle/ChillPersonBundle/Controller/HouseholdMemberController.php

@@ -50,8 +50,12 @@ class HouseholdMemberController extends ApiController
 
         // TODO ACL
         //
-        // TODO validation
-        //
+        $errors = $editor->validate();
+
+        if (count($errors) > 0) {
+            return $this->json($errors, 422);
+        }
+
         $em = $this->getDoctrine()->getManager();
 
         // if new household, persist it