The `typo3/minimal` package is not maintained very much, and currently
cannot be used as a requirement to install the latest TYPO3 development
version (as it still depends on `dev-master`, not on `dev-main`).
In addition, not depending on it will allow us to find any missing
dependencies in our requirements that so far have been masked by
the `typo3/minimal` dependencies.
(This is the same as #520, but for GitLab CI.)
It might happen, when starting the fuctional test that the database service container is not ready yet.
This patch provides an extra timeout to wait for the service to make sure the test does not fail because of missing database.