Before this PR, the `bus subscription is refreshed when channel is
left` test was sometimes failing. This actually reveals a real issue:
if a channel is joined a leave very quickly, the bus subscription is
not updated.
This occurs because we rely on the last subscription made and the one
that should be made to detect if channels differ. Since the
`updateBusSubscription` method is debounced, we can miss information.
This PR replaces the complicated `updateBusSubscription` method by a
`onAdd/onDelete`. This is much more reliable and more efficient since
there is no need to walk through every channel to detect changes.
This PR also remove a test that was redundant that the failing one.
fixes runbot-55292,57645,56232
closesodoo/odoo#155720
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>
tsm-odoo
440e6a5b86