Coop agreement sponsorship

See merge request coopdevs/odoo-somconnexio!5

Also overwrite the coop_candidate compute method

Model to relate partner with a list of products available for their
sponsee partners. Add a code to identify the agreement.
Add permissions groups to manage the access right of this model.
We define two levels, one for create, read, write and unlink called
manager and one only with read access called user.

Revert "Merge branch 'last_subscription_request' into 'master'"

See merge request coopdevs/odoo-somconnexio!8

This reverts merge request !6

Last subscription request

See merge request coopdevs/odoo-somconnexio!6

Added contract dependencies

See merge request coopdevs/odoo-somconnexio!7

Add as depends the OCA modules to improve the UI

See merge request coopdevs/odoo-somconnexio!4

Move all the logic of sponsorship to a new module

See merge request coopdevs/odoo-somconnexio!3

Created new module called: easy_my_coop_sponsorship with all the logic
of the sponsorship management.
Add the new module to depends of this module.

Sponsee to member wizard

See merge request coopdevs/odoo-somconnexio!2

Add sponsorship to subscription

See merge request coopdevs/odoo-somconnexio!1