keystone_user_role doesn't support email address as username

[Valery Tschopp]

We defined the keystone user with the email address, but the keystone_user_role parsing doesn't handle it correctly.

user: "<email address hidden>"
tenant: "test"

user_role_name: "<email address hidden>@test"

Because of the use of the split('@',2) method it will be parsed as:
  user: "user"
  tenant: "example.org@test"

A patch is attached.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/108677

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/108677
Committed: https://git.openstack.org/cgit/stackforge/puppet-keystone/commit/?id=9b2078a6e5a892626a40be462bf7a8f88c2254da
Submitter: Jenkins
Branch: master

commit 9b2078a6e5a892626a40be462bf7a8f88c2254da
Author: Valery Tschopp <email address hidden>
Date: Tue Jul 22 14:46:00 2014 +0200

    keystone_user_role supports email as username

    When defining the keystone user with the email address, the keystone_user_role doesn't handle it correctly.

    user: "<email address hidden>"
    tenant: "test"

    keystone_user_role { "<email address hidden>@test":
      roles = '_member_'
    }

    Because of the use of the split('@',2) method, user and tenant will be parsed as:
      user: "user"
      tenant: "example.org@test"

    By using rpartition('@'), it will be correctly parsed as:
      user: "<email address hidden>"
      tenant: "test"

    A unit test for the keystone_user_role provider is available.

    Change-Id: I68139910bb82c62f26ba3433456e5406c99541a2
    Closes-Bug: 1341552