Fix flaky tests: re-use created test data

Rutger Wesselsrequested to merge
534635-use-let_it_be-2 into master

What does this MR do and why?

Fix flaky tests: re-use created test data

The tests failed with Capybara timeouts. Probably because repeated projects and groups creating takes too much time

Locally, running this spec files was taking 90 seconds and now 80.

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Related to #534635 (closed)

Edited by Rutger Wessels

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