[IMP] Cancelling of procurements related to purchase orders should check state/UoM of the purchase order line + optim action_cancel

[IMP] Add tests

[IMP] Clean up
Merge branch '8.0-wmspurchaseproccanceloptim-jco' of github.com:odoo-dev/odoo; branch '8.0' of github.com:odoo/odoo into 8.0
[IMP] Cancelling of procurements related to purchase orders should check state/UoM of the purchase order line + optim action_cancel

[IMP] Add tests

[IMP] Clean up
Merge branch '8.0' of github.com:odoo/odoo into 8.0
[IMP] No lot in qty update as it is only confusing #3984
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-linux64