preemptive auth in non-lightweight http wagon causes Unauthorized responses from some servers

the http wagon uses preemptive authentication, which means that if you have a server entry with username and password in it that don't correspond to a user on the server you're trying to reach, that server will sometimes respond with Unauthorized regardless of whether authentication is even required to perform that operation on that target URL.

We should allow the configuration strategy from WAGON-269/WAGON-264 to configure the 'http.authentication.preemptive' httpclient parameter, and turn off preemptive authentication by default.