refs #6301, #4176
- always check existence of items before attempting to create them, in order to prevent duplicates
- provide stats on how many object creations are expected vs done
- split out and improve fixture utils tests (100% covers utils)
refs #6301
- The order of model fixtures matters, so they should be in an array
- By splitting out the population code into a utils file, it'll be possible to use this to do updates as well
- This should make it much easier to do permissions updates in future