Having the window maximise during a test run makes it difficult
to work with other windows, especially on a single-monitor
computer. This patch removes the maximisation call.
This patch also adds a "local" configuration mechanism to allow
developers to have local configuration of the integration test
environment without it affecting the git repository.
Change-Id: I8a7acbe40deaec5cca904526e3f3c8bc3357744c
Closes-Bug: 1540719
Initial setup for running the integration tests. A basic test is
included to ensure this works, although it will be rewritten to follow
the Page Object pattern. Thanks to Daniel Korn for the initial test.
https://wiki.openstack.org/wiki/Horizon/Testing/UI
Implements blueprint: selenium-integration-testing
Change-Id: Id5b62cdeac5295667a3922f7bed1db3c7617f841