Artifactory without enabled "anonymous access" doesn't use revisions

[lasote]

If the "anonymous access" is not enabled in Artifactory, the "ping" Conan endpoint returns a 401 if no authentication is sent, so the capabilities are never read, but the 401 is currently ignored by the client, storing an empty set of capabilities for the remote.

To fix this, we have to raise an exception if we receive a 401 in the "ping" endpoint so we force the authentication process in the client. But there is another issue to solve: the authenticating process in the client is trying to get the capabilities to know if it should use v1 or v2 so it is like a snake biting its own tail.

It can be fixed by using always "v1" to authenticate and not hiding the 401 in the ping endpoint.

[lasote]

Fixed, will be released at 1.18.2