- add payment_request
- also index non accountable movements

to get rid of movement table dependancy

tickets are also in delivery table

InventoryListBrain does not need a getQuantity method which returns something
else that the total_quantity on this brain, this is just confusing (and using
movement table)

The idea is to use Inventory API instead.

Also, movement with 0 price where ignored by omit_asset_increase /
omit_asset_decrease
Signed-off-by: Aurélien Calonne <aurel@nexedi.com>

Signed-off-by: Aurélien Calonne <aurel@nexedi.com>

To migrate, run:
alter table stock add column payment_request_uid bigint unsigned after funding_uid, add index payment_request_uid (payment_request_uid);
alter table inventory_stock add column payment_request_uid bigint unsigned after funding_uid;

To migrate, run:
alter table stock add column funding_uid bigint unsigned after payment_uid, add index funding_uid (funding_uid);
alter table inventory_stock add column funding_uid bigint unsigned after payment_uid;

This hurts performances a lot.

... instead of relying on automatic migration.

This fixes TestCMFActivity.test_connection_sortkey on Zope 2.13