[sahara] Allow username password to be optional for data sources/job binaries

[Chad Roberts]

*needed for juno*

The data processing system is changing from stored credentials for containers to a trust-based authentication system. This requires the UI to make username/password optional fields for data sources and job binaries.

The corresponding Sahara project blueprint is: https://blueprints.launchpad.net/sahara/+spec/edp-swift-trust-authentication

[Sergey Lukjanov (slukjanov)]

Fixed in: https://review.openstack.org/#/c/119439/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/119439
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=6c9b164c0d5aa444cce9caa158d713807da5bc2d
Submitter: Jenkins
Branch: master

commit 6c9b164c0d5aa444cce9caa158d713807da5bc2d
Author: Chad Roberts <email address hidden>
Date: Fri Sep 5 13:53:41 2014 -0400

    Making credentials optional for data sources

    Username/password credentials are now optional
    fields when creating a data source. This is
    possible because a fully updated sahara system
    will use trusts to grant/revoke permissions
    rather than passing around a username/password.

    Change-Id: I7df556295e7e1b5c5e73230b294d4e8f8b7f05f3
    Closes-Bug: #1367394