[odrs-web/production] trivial: Make pylint happy with cron.py

[Richard Hughes <rhughes src gnome org>]

commit 76841aed538e251a15ceb0a1f40265abfe19d3a5
Author: Richard Hughes <richard hughsie com>
Date:   Fri May 25 15:55:56 2018 +0100

    trivial: Make pylint happy with cron.py

 cron.py |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/cron.py b/cron.py
index 8a189d6..9554da3 100755
--- a/cron.py
+++ b/cron.py
@@ -4,11 +4,12 @@
 # Copyright (C) 2016-2018 Richard Hughes <richard hughsie com>
 # Licensed under the GNU General Public License Version 3
 
+from __future__ import print_function
+
 import json
-import os
 import sys
 
-from app.db import Database
+from app.db import Database, CursorError
 
 if __name__ == '__main__':
 
@@ -29,7 +30,7 @@ if __name__ == '__main__':
                 item[app_id] = ratings
         except CursorError as e:
             print(str(e))
-            os.exit(1)
+            sys.exit(1)
 
         # dump to file
         dat = json.dumps(item, sort_keys=True, indent=4, separators=(',', ': '))