ExchangeFilterFunctions.basicAuthentication(String, String) should cache the encoded credentials

[membersound]

Similar to gh-23204, ExchangeFilterFunctions.basicAuthentication(String, String) should also cache the encoded credentials.

At present, a new encoding takes place for any web request made through a WebClient configured with .filter(ExchangeFilterFunctions.basicAuthentication(user, pass)).

[sbrannen]

Good catch. I'll make the necessary changes in ExchangeFilterFunctions as well.

[sbrannen]

This has been resolved in f0d5994.