The integration tests depend on the presence of external servers
and the user settings.
First, people are bothered by failing test due to problems with
those servers and second, administrators need to run phpunit tests
to verify the configuration settings.
Therefore, we move the integration tests to a special page.
Bug: T87389
Change-Id: If66f13fe7fa16868cd4b1d8f0e0a6e3d49448b27
