Update for new path to token auth key

[mikedep333]

They were moved from /etc/pulp to /etc/pulp/certs

from pulp_installer's git history

commit f4fd4608e4e93864d2c9e09c161be8b7010260fd (origin/pr/400, mikedep333/7328_tls_certs_dir)
Author: Mike DePaulo <mikedep333@redhat.com>
Date:   Thu Aug 20 11:16:17 2020 -0400

    Problem: pulp_installer installs TLS certs in /etc/pulp
    
    rather than /etc/pulp/certs/ like we decided it would, and the
    pulpcore docs say it defaults to.
    
    Solution: Set the new location to /etc/pulp/certs.
    
    And deduplicate the variables for installing python's crypto library
    and the dir to use for API authentication tokens, which already was
    /etc/pulp/certs .
    
    No automated solution will be provided to move the keys, we will simply
    release ASAP before too many user installs get the wrong location.
    And tell users to move their keys.
    
    fixes: #7328
    pulp_installer and ssl docs disagree
    https://pulp.plan.io/issues/7328