136ccff353
If system_keyspace::stop() is called before system_keyspace::shutdown(),
it will never finish, because the uncleared shared pointers will keep
it alive indefinitely.
Currently this can happen if an exception is thrown before the construction
of the shutdown() defer. This patch moves the shutdown() call to immediately
before stop(). I see no reason why it should be elsewhere.
Fixes scylladb/scylla-enterprise#4380
(cherry picked from commit eeaf4c3443)
Closes scylladb/scylladb#20146