Steps to reproduce:
1) start from a clean database (http_routing should not be installed).
2) go to the app menu and install project (don't install via `-i`!!).
3) traceback: `request` has not attribute `is_frontend` while rendering
a template.
The `is_frontend` attribute on request is set by the http_routing
module. At the moment the "install now" button is clicked, http_routing
was not installed so the `is_frontend` attribute was not set.
FF to the end of the installation: the registry is reloaded to include
the modules that have been installed, http_routing among them.
We are in a tricky situation: (1) there is a request, (2) http_routing
is installed and (3) the `is_frontend` attribute is missing from the
request.
This situation is illegal, when http_routing is installed, the
`is_frontend` attribut should always be set. In this work we reset the
missing attributes using sensitive default values via post-init hooks.
closesodoo/odoo#87684
Signed-off-by: Julien Castiaux <juc@odoo.com>