PURPOSE

Allow karma gain tracking enabling notably display of top users based on
weekly / monthly gain in website profile.

SPECIFICATIONS

Each time a user gains karma a record is created in the gamification karma
tracking model. Scheduled activity runs to consolidate the records into
monthly gain records to avoid having crowdy table and unnecessary noise
in karma gain.

This model is made private and only accessible through some dedicated
compute methods / controllers used in website profile.

In website profile module buttons are added to see users ranking based
on their total karma (like before) but also by last week and last month
gains (using the newly introduced tracking model).

Some fixes are provided in this merge as well as tests.

LINKS

Task ID 2003505
PR #34594

Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>