Fix view name.

ticdesk_org/urls.py

@@ -4,7 +4,7 @@ from . import views
 
 urlpatterns = [
     url(r'^persons$', views.persons, name='persons'),
-    url(r'^persons/(?P<group>[a-z][a-z0-9-]+)$', views.persons, name='org:persons_by_group'),
+    url(r'^persons/(?P<group>[a-z][a-z0-9-]+)$', views.persons, name='persons_by_group'),
     url(r'^person$', views.person, name='person'),
     url(r'^person/(?P<uid>[a-z][a-z0-9]+)$', views.person, name='person_by_uid'),
     url(r'^map$', views.map, name='map'),