'account_accountant' is only defined in enterprise.
Before this commit, many of us forgot to manually install it
before running main_flow_tour in enterprise.
Plus, it was difficult to know that a required module is missing
when a step failed. The error was not clear.
Now, the post hook will check if this module exist (it's the case in
enterprise) and will install it.
This module defines tours meant to test some cross-app workflows in Odoo.
At this time, it contains a 'tour' that do some important tasks like:
- product creation
- sale order creation
- reordering rule
- invoicing
- reconciliation
- ...