The data update service writes the license keys to the log #167

What happens

FiftyOneUrlFormatter puts the license keys in the query of the URL each data update request is sent to (FiftyOneUrlFormatter.java line 37). downloadFile logs that URL, keys included:

• at debug level for every download (DataUpdateServiceDefault.java lines 595 to 596) and when there is no newer data (lines 629 to 630)
• at error level when there is no response, when the service answers 429, when access is denied and for any other failing status (lines 601 to 602, 625 to 626, 633 to 634 and 637 to 638)

A license key is a paid credential, and log entries travel further than the server, to log services and support tickets.

What is needed

1. Name the configured data update URL, which carries no key, or the formatted URL with the keys removed, in every log entry and exception message.
2. A test that a failed update with a license key produces no log entry holding the key.

The specification change is 51Degrees/specifications#55. The Rust SDK's change is 51Degrees/rust#175.