Sprig is not using transactions when loading data

[tilo]

if something breaks when loading fixtures, e.g. because of incompatible DB schema version,
Sprig just bails out -- leaving partial data in the database.

It should use transactions for this

[ltk]

Hey @tilo, quick update: We've started work on this. 73ef516

For now I think we'd like to keep existing behavior by default, but provide the option to wrap the process in a transaction via the configuration block.

We just need to clean some things up, fix up our tests for the Mongoid version of the suite run, and then we'll put this into a release.

Thanks for filing this issue.