"keystone-manage mapping_purge" ignores --type option

[Dai Hanada]

Description
===========
Although I executed "keystone-manage mapping_purge --type user", not only user entities but also group entities were purged.
It seems that "--type" option was ignored.

Steps to reproduce
==================
1. "id_mapping" table of keystone db has a user and a group entity.

  MariaDB [keystone]> select * from id_mapping;
  +------------------------------------------------------------------+----------------------------------+-----------+-------------+
  | public_id | domain_id | local_id | entity_type |
  +------------------------------------------------------------------+----------------------------------+-----------+-------------+
  | a8fdd84b61106a6429908fab68e989751edaca9f84f7413b6d6598426c703b15 | d06cf4dec767422580c7ff24c6526b8f | demo | user | <-- user
  | 9525834b497a7ebac4fa8d6cb19c6c1f2b784540f8914a7abd1404642587a8e3 | d06cf4dec767422580c7ff24c6526b8f | testgroup | group | <-- group
  +------------------------------------------------------------------+----------------------------------+-----------+-------------+

2. Execute "keystone-manage mapping_purge" with "--type user" option.

  # keystone-manage mapping_purge --type user

3. Both of the user and the group entity were purged.

  MariaDB [keystone]> select * from id_mapping;
  Empty set (0.00 sec) <-- The command purged all mappings as same as without options.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/554397

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/554397
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=74684cf53bffb17af1012af30daf04abfdadc253
Submitter: Zuul
Branch: master

commit 74684cf53bffb17af1012af30daf04abfdadc253
Author: DaiHanada <email address hidden>
Date: Wed Feb 7 14:21:38 2018 +0900

    Fix keystone-manage mapping_purge with --type option

    "keystone-manage mapping_purge" has "--type" option in order to select
    mappings which have to be deleted. However, the option doesn't work
    and all mappings are purged when specifying this option.
    The command passes a value of the option to purge_mappings API with
    a key name "type", but the API expects "entity_type".

    Change-Id: Ib222d70d4cf6bb61847cef049ec1ded5c2ff2c8b
    Closes-Bug: #1757022

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/keystone 14.0.0.0rc1 release candidate.