* Add openstack service discovery.

* Add gophercloud code for openstack service discovery.

* first changes for juliusv comments.

* add gophercloud code for floatingip.

* Add tests to openstack sd.

* Add testify suite vendor files.

* add copyright and make changes for code climate.

* Fixed typos in provider openstack.

* Renamed tenant to project in openstack sd.

* Change type of password to Secret in openstack sd.