If user_id is accessed before view_args has been setup, we should not cache
`None` as value but instead raise an exception.
The `user_id` may be accessed before the mapping if the request is logged
because the representation of the request used the `rpc_method` which needs to
parse the request data. But since 1923117e935d parsing compressed content is
only allowed for request with `user_id`.
So we can no more include the `rpc_method` is the request has not yet been
mapped and so it has a `view_args`.
Closes#13203
(grafted from 0630029c1d5a0a2c7bd45086957f2e0fbed4c427)
--HG--
branch : 6.0
Cédric Krier
e6fe291bde