Fix inline documentation for running Keystonemiddleware

[Lance Bragstad]

The auth_token middleware code claims it can be run using the following:

https://github.com/openstack/keystonemiddleware/blob/d436ec737a4ecfe653d934c6f4a71f411b7f9cc2/keystonemiddleware/auth_token/__init__.py#L38

But it throws an error that seems to be related to package paths:

http://cdn.pasteraw.com/ozla7dsw8521wwai9ghyy5cniq6ddm2

Note that the using the following works:

    python -m keystonemiddleware.auth_token.__init__

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/165171

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/165171
Committed: https://git.openstack.org/cgit/openstack/keystonemiddleware/commit/?id=809967f189b00116ac54576c61394b7fc045c5c3
Submitter: Jenkins
Branch: master

commit 809967f189b00116ac54576c61394b7fc045c5c3
Author: Lance Bragstad <email address hidden>
Date: Tue Mar 17 18:15:53 2015 +0000

    Pull echo service out of auth_token.

    Move Keystonemiddleware's Echo service out of keystonemiddleware.auth_token and
    into its own module.

    Change-Id: I9e557582e8361d6c2aa6e73a357b0d6c9c88ea4e
    Closes-Bug: 1433251