Stop logging the value of a user-specified Authorization header

[inqueue]

Rally version (get with esrally --version): 2.9.0.dev0 (git revision: a7387ae7ddc53098d640130900a6f5cf2aa5c85e)

Invoked command:

esrally race --track=geonames --pipeline=benchmark-only --client-options='{"default": {"use_ssl": true, "headers":{"Authorization":"ApiKey aE...=="}}}' --target-hosts=target.es.host:9200 --kill-running-processes --test-mode

Description of the problem including expected versus actual behavior:

Rally treats the Authorization header specified in client options like any other header, logging its value in rally.log. Rally should recognize the use of the header and not log its value.

Provide logs (if relevant):

2023-08-07 19:37:59,371 ActorAddr-(T|:46475)/PID:388 esrally.client.factory INFO Creating ES client connected to [{'host': 'target.es.host', 'port': 9200}] with options [{'use_ssl': True, 'headers': {'Authorization': 'ApiKey aE...=='}}]

[jakelandis]

While you're at it, should probably avoid logging es-secondary-authorization and ES-Client-Authentication as well. Those can also carry credentials but only for specific workflows.