Comment 19 for bug 1655182

Verification done for trusty/mitaka.

Before upgrade:
root@juju-8feceb-1:~# keystone-manage mapping_engine --rules mapping.json --input input.txt
root@juju-8feceb-1:~# tail /var/log/keystone/keystone.log
Traceback (most recent call last):
  File "/usr/bin/keystone-manage", line 10, in <module>
    sys.exit(main())
  File "/usr/lib/python2.7/dist-packages/keystone/cmd/manage.py", line 47, in main
    cli.main(argv=sys.argv, config_files=config_files)
  File "/usr/lib/python2.7/dist-packages/keystone/cmd/cli.py", line 1024, in main
    CONF.command.cmd_class.main()
  File "/usr/lib/python2.7/dist-packages/keystone/cmd/cli.py", line 949, in main
    rp = mapping_engine.RuleProcessor(rules['rules'])
TypeError: __init__() takes exactly 3 arguments (2 given)

After upgrade:
root@juju-8feceb-1:~# keystone-manage mapping_engine --rules mapping.json --input input.txt
{
  "group_ids": [],
  "user": {
    "domain": {
      "id": "default"
    },
    "type": "local",
    "name": "abc"
  },
  "group_names": []
}