Update fixtures by removing Trainings and adding Travels

I've updated fixtures to use new `Travel` product type and remove old `Training` products.

Here there are:

![capture decran 2014-01-23 a 18 21 35](https://f.cloud.github.com/assets/103900/1987210/68b8aec0-8456-11e3-80a4-2ca7b077da23.png)