Generic factories with FactoryGirl

[diegoamc]

Today, everytime we have to modify a factory, we have to modify it in at least 3 different projects. For example, if we change the ReadingGroup factory on KalibroConfigurations project, we would also need to change the code on KalibroProcessor, KalibroClient and Prezento.

As KalibroClient is used by Prezento and KalibroProcessor, we'd like to import common factories directly from KalibroClient on those projects. That way, we would avoid some duplication.

What we need to do is to refactor those factories to sequence the ids, use associations and correct the use of traits (we don't need to create new factory names for each new trait).
Next, we have to find a way to import them on KalibroProcess and Prezento.
Finally, it would be even better if there is a way to import them on KalibroConfigurations too.