Ignore possible failure of updatedb command during deployment

deploy.py

@@ -95,7 +95,7 @@ def _update_site_database(target, environment):
     Helper function to update site database.
     :param environment
     """
-    run('drush --yes --root={} updatedb'.format(target.get('root')))
+    run('drush --yes --root={} updatedb || true'.format(target.get('root')))
     print(green('The target environment {} is up-to-date.'.format(environment)))