explored various options for setting up and customizing test data

@Schonhoffer @sschlesier @radicre

We have been talking about setting up and customizing test data while pairing on orphan products with @sschlesier.

This PR explores the following options:
- manual test data setup
- NBuilder
- SimplyTestData
- Autofixture
- FakeItEasy (Dummy & Fake which are very similar)

Let me know what your thoughts are:
- which style of test data setup you prefer & why
- are you familiar with other altenatives