[FIX] service: properly invalidate session of deteled users

If a user A deletes the res.users record of user B while B is connected,
the verification of the session token fails with a comparison of a boolean and
bytes values.
While the check should obviously fail, this patch gracefully inform the user B
its session has expired and redirect him to the login page.

Without the patch, the session is never invalidated in the user browser,
redirecting to a forbidden error page as long as the session has not been manually
cleared from the browser.

Fixes #25530
Closes #25654
Closes #25682

Cherry-Pick of 96f01c08f8

openerp/service/security.py

@@ -18,7 +18,8 @@ def compute_session_token(session, env):
 
 def check_session(session, env):
     self = env['res.users'].browse(session.uid)
-    if openerp.tools.misc.consteq(self._compute_session_token(session.sid), session.session_token):
+    expected = self._compute_session_token(session.sid)
+    if expected and openerp.tools.misc.consteq(expected, session.session_token):
         return True
     self._invalidate_session_cache()
     return False