Breaks compatibility with old sahara service type when using keystone session

[Sergey Reshetnyak]

Steps to reproduce:
1. Set up only old sahara service type in service catalog (data_processing)
2. Try to authorize in saharaclient using keystone session

Error:
http://paste.openstack.org/show/205379/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/176960

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/176960
Committed: https://git.openstack.org/cgit/openstack/python-saharaclient/commit/?id=b63f52fa53e60b876ba03403fa4c26cba7ba9d4e
Submitter: Jenkins
Branch: master

commit b63f52fa53e60b876ba03403fa4c26cba7ba9d4e
Author: Sergey Reshetnyak <email address hidden>
Date: Thu Apr 23 22:56:14 2015 +0300

    Try getting old service type if session used

    If set up old sahara service type in keystone service catalog
    (data_processing) then if you use keystone session for auth,
    saharaclient do not checks old service type.
    This patch fixes this problem.

    Change-Id: I148c0f59fde791c1c1cff63ea27fd6d489744ce1
    Closes-bug: #1447797