Updated openstack/openstack
Project: openstack/tempest  787c03313fe2b04a9fcbcaf11fe432f89fec5510

Remove interface json and set skip_test method

According to last comments to previous patch:
https://review.openstack.org/#/c/117458/28
 - remove interface=json
 - add skip checks to separate method

Change-Id: Id596b8d33533088f79e20293a980ad2ec80198a6