Turn Down Logging for Auth Failures

[ric-evans]

Bots normally hit the index path routinely (/). This should always fail due to invalid auth. However, this bloats the logs due to the current logging scheme.

Example:

2024-10-18 13:27:18.952 [   DEBUG] skydriver-rest-7f975b4f94-z7v29 rest[1] GET [MainHandler] <handler.py:172/prepare()>
2024-10-18 13:27:18.952 [   DEBUG] skydriver-rest-7f975b4f94-z7v29 root[1] routestats: [0.0005822181701660156, 0.0006031990051269531, 0.0007824897766113281] <stats.py:63/is_overloaded()>
2024-10-18 13:27:18.952 [    INFO] skydriver-rest-7f975b4f94-z7v29 rest[1] failed auth <handler.py:165/get_current_user()>
Traceback (most recent call last):
  File "/home/app/.local/lib/python3.11/site-packages/rest_tools/server/handler.py", line 153, in get_current_user
    type, token = self.request.headers['Authorization'].split(' ', 1)
                  ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/home/app/.local/lib/python3.11/site-packages/tornado/httputil.py", line 216, in __getitem__
    return self._dict[_normalize_header(name)]
           ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'Authorization'
2024-10-18 13:27:18.952 [ WARNING] skydriver-rest-7f975b4f94-z7v29 root[1] 403 GET / (10.42.2.126) 1.41ms <server.py:27/tornado_logger()>
2024-10-18 13:27:19.080 [    INFO] skydriver-rest-7f975b4f94-z7v29 tornado.general[1] Malformed HTTP message from 10.42.2.126: Malformed HTTP version in HTTP Request-Line: 'HTTP/2.0' <http1connection.py:292/_read_message()>

This PR removes the stack trace unless the "rest" logger is enabled for "debug" (at least).

[dsschult]

One comment, otherwise looks good.

[dsschult]

I think this should just be info level?

[ric-evans]

sure thing