db upgrade group.roles->permissions

bin/database.py

@@ -1114,6 +1114,22 @@ def upgrade_to_30():
 def upgrade_to_31():
     config.db.sessions.update_many({'subject.firstname_hash': {'$exists': True}}, {'$unset': {'subject.firstname_hash':""}})
     config.db.sessions.update_many({'subject.lastname_hash': {'$exists': True}}, {'$unset': {'subject.lastname_hash':""}})
+def upgrade_to_32_closure(group):
+    result = config.db.groups.update_one({'_id': group['_id']}, {'$rename': {'roles': 'permissions'}})
+
+    if result.modified_count == 1:
+        return True
+    else:
+        return 'Parallel failed: update doc ' + str(job['_id']) + ' resulted modified ' + str(result.modified_count)
+
+def upgrade_to_32():
+    """
+    Changes group.roles -> groups.permissions
+
+    scitran/core #662
+    """
+    cursor = config.db.groups.find({})
+    process_cursor(cursor, upgrade_to_30_closure)
 
 def upgrade_to_32_closure(coll_item, coll):
     permissions = coll_item.get('permissions', [])