Some parameters of job executions create should not be required

[Andrey Pavlov]

input_id, output_id, configs parameters of job executions create method should be optional. This change doesn't break backward compatibility.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/237501

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/237501
Committed: https://git.openstack.org/cgit/openstack/python-saharaclient/commit/?id=1e986fa23c8e7443b51e1477b923f0fc656a0e7c
Submitter: Jenkins
Branch: master

commit 1e986fa23c8e7443b51e1477b923f0fc656a0e7c
Author: Andrey Pavlov <email address hidden>
Date: Tue Oct 20 13:11:12 2015 +0300

    Making parameters of job executions create optional

    input_id, output_id, configs parameters of job execution
    create method should not be required.
    This change doesn't break backward compatibility.

    Change-Id: I01fb2406264c671aa15351df834814d32d3275a6
    Closes-bug: #1507966