add logistic_requisition_department
add department to lrl view
add department to lrs view
propagate department from lrs to tender
travis: pull OCA/department
use self.env.user
use self.env.ref

I prefer it because it works everywhere, not only on tests. It makes
sense to use the env for that.
Merge pull request #94 from lepistone/logistic-department

add module logistic_requisition_department