Review travis_retry usage in CI code [2h]

[AronNovak]

We have an issue with travis_retry generally.
In some cases, `travis_retry˙ cannot really re-try the things, as there are things inside the scripts that fail for the 2nd time of execution always. Let's review the scripts to make sure things are in theory at least executable multiple times, one after the other, if a random (network) error happens.

Follow .travis.yml.
Feel free to add more travis_retry where makes sense.

Beware of https://github.com/Gizra/drupal-starter/blob/main/.travis.template.yml