[8.0] port of module logistic_requisition

Here is a first PR porting the code of logistic_requisition to 8.0 api and to new 8.0 workflow

Some tests are commented as they need to be adapted to new 8.0 workflow.

It also:
* breaks link between logistic requisition source and sale order line to simplify the code and to add flexibility
* ports webkit report to Qweb
* removes dependancy on transport_plan

depends on

 - [x] https://github.com/OCA/sale-workflow/pull/49
 - [x] https://github.com/OCA/purchase-workflow/pull/26
to remove as it is too specific