Updated openstack/openstack
Project: openstack/horizon  9d5aa8e864cd9c7002fb3d9e1f32fb11f577c6c2

Add _wait_till_text_present_in_element method

* add selenium configuration group
* add implicit/explicit wait and set page timeout

Partially implements blueprint: selenium-integration-testing

Change-Id: If39a5dcbac45635ad9988edfdc1830aeabc663a4