Update labels in nuxeo cli to mention tokens instead of password

In order to know that a token is needed to execute a command against nos after migrating to okta

when using a command that requires a password like nuxeo studio export, label is changed from

NOS Password:

to

NOS Token:

When entering a wrong login / token couple, answer is changed from

Unable to authenticate to NOS Services

to

Unable to authenticate to NOS Services. Please make sure you use a token created at https://connect.nuxeo.com/nuxeo/site/connect/tokens