Updated openstack/openstack
Project: openstack/tempest  88cec98e61d1ad78bfabb8b9d1d8205a659c8817

Remove not used attribute _schema_file

This was actually a remaining of [1].

[1]: https://review.openstack.org/#/c/115918

Change-Id: Idcf589fa9d89c2969914ef0c8aee27a22325470e