Add notification service option

UPS provide some options to notify the customer. I think it will be good to be able to configure per carrier the notification option to activate by default.

assigned to @ced

added stock type::feature + 1 deleted label

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New review374971002 at https://codereview.tryton.org/374971002/#ps374981002

review374971002 updated at https://codereview.tryton.org/374971002/#ps388011002

New changeset d0375e0d8f15 by Cédric Krier in branch 'default':
Add notification service option
https://hg.tryton.org/modules/stock_package_shipping_ups/rev/d0375e0d8f15

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closed

New changeset e91c6cb54ded by Cédric Krier in branch 'default':
Add notification service option
https://hg.tryton.org/tryton-env/rev/e91c6cb54ded