Major Description
Httpclient will try to authenticate in this order by default: ntlm, digest, basic.
If you set as default a scheme that comes in this list after a scheme that is negotiated by the server, and this authentication fails, the default scheme will not be tried.
I.e. if you set digest as default scheme but the server negotiates ntlm, the client will still try ntlm and fail.
The fix sets the default scheme as the only possible scheme for authentication for the given realm by setting the authentication priorities of httpclient.