Add role create and edit events

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/permissions/events.py

@@ -0,0 +1,16 @@
+from __future__ import absolute_import, unicode_literals
+
+from django.utils.translation import ugettext_lazy as _
+
+from mayan.apps.events import EventTypeNamespace
+
+namespace = EventTypeNamespace(
+    label=_('Permissions'), name='permissions'
+)
+
+event_role_created = namespace.add_event_type(
+    label=_('Role created'), name='role_created'
+)
+event_role_edited = namespace.add_event_type(
+    label=_('Role edited'), name='role_edited'
+)