views: Show error when not able to retrieve oglive list

Show the user an error if ogServer responds with an error when
retrieving oglive list

ogcp/views.py

@@ -877,6 +877,10 @@ def action_client_info():
     form.boot.data = db_client['boot']
 
     r = server.get('/oglive/list')
+    if r.status_code != requests.codes.ok:
+        flash(_('ogServer: error retrieving oglive list'),
+              category='error')
+        return redirect(url_for('commands'))
     available_oglives = r.json()['oglive']
     for oglive in available_oglives:
         choice = (oglive.get('directory'), oglive.get('directory'))