Add management command to perform steps required after an upgrade.

mayan/apps/common/management/commands/performupgrade.py

@@ -0,0 +1,14 @@
+from __future__ import unicode_literals
+
+from django.core import management
+
+from ...signals import perform_upgrade
+
+
+class Command(management.BaseCommand):
+    help = 'Performs the required steps after a version upgrade.'
+
+    def handle(self, *args, **options):
+        management.call_command('migrate', interactive=False)
+        management.call_command('purgeperiodictasks', interactive=False)
+        perform_upgrade.send(sender=self)

mayan/apps/common/signals.py

@@ -3,3 +3,4 @@ from __future__ import unicode_literals
 from django.dispatch import Signal
 
 post_initial_setup = Signal(use_caching=True)
+perform_upgrade = Signal(use_caching=True)