Comment 7 for bug 1567394

Reviewed: https://review.openstack.org/304529
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=7e3fe2c308918f4f8abc42ad7d1584b4e4afadfc
Submitter: Jenkins
Branch: master

commit 7e3fe2c308918f4f8abc42ad7d1584b4e4afadfc
Author: Artur Svechnikov <email address hidden>
Date: Tue Apr 12 14:23:24 2016 +0300

    Validate attributes restrictions

    Since Nailgun contains attributes restriction
    mechanism it's possible to verify attributes
    restrictions. This commit applies restrictions
    checks into validation for both node attributes
    and cluster attributes.

    Change-Id: I269da9a7a7df5fea336c07784b37d6ced1641993
    Closes-Bug: #1567394