Fix some issues caused by changes made over the last year

RIGS/management/commands/generateSampleData.py

@@ -1,7 +1,7 @@
 from django.core.management.base import BaseCommand, CommandError
 from django.contrib.auth.models import Group, Permission
 from django.db import transaction
-import reversion
+from reversion import revisions as reversion
 
 import datetime
 import random