Add support for Find Roles by Permission X feature

tailbone/templates/roles/find_by_perm.mako

@@ -0,0 +1,21 @@
+## -*- coding: utf-8 -*-
+<%inherit file="/principal/find_by_perm.mako" />
+
+<%def name="principal_table()">
+  <table>
+    <thead>
+      <tr>
+        <th>Name</th>
+      </tr>
+    </thead>
+    <tbody>
+      % for role in principals:
+          <tr>
+            <td>${h.link_to(role.name, url('roles.view', uuid=role.uuid))}</td>
+          </tr>
+      % endfor
+    </tbody>
+  </table>
+</%def>
+
+${parent.body()}