action domain-setup command update for juju 2

[Vance Morris]

Please amend the charm doc to include the different command for juju 2:

$ juju run-action heat/0 domain-setup
Action queued with id: 4c93b31e-9e5b-46a1-89ae-e774f614c65e

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/458922
Committed: https://git.openstack.org/cgit/openstack/charm-heat/commit/?id=aa46ea4b621bd72a2e8f1e5e8a1c0ac102acd173
Submitter: Jenkins
Branch: master

commit aa46ea4b621bd72a2e8f1e5e8a1c0ac102acd173
Author: Felipe Reyes <email address hidden>
Date: Fri Apr 21 14:42:21 2017 -0300

    Document how to run domain-setup in juju 2.x

    Add to the README.md an example of how to run the action `domain-setup`
    when using juju 2.x

    Change-Id: Idbf7468424d8cd709bde8cc8d0439911c4fc3547
    Closes-Bug: 1667780

[Patrizio Bassi (patrizio-bassi)]

web page https://jujucharms.com/heat/239 still has old juju 1.x documentation, please upgrade it

[Felipe Reyes (freyes)]

On Wed, May 03, 2017 at 07:34:09AM -0000, Patrizio Bassi wrote:
> web page https://jujucharms.com/heat/239 still has old juju 1.x
> documentation, please upgrade it

it will be updated once a new version is released (during this month).