(maint) Improve x509 auth test
(maint) Improve x509 auth test

This updates the auth test to not specify --server, instead relying on
the new config updates in the pre-suite. It also uses
with_puppet_running_on where before it HUP'ed the server.

puppetlabs/puppet-server,puppetlabs/puppetserver,puppetlabs/puppetserver,puppetlabs/puppetserver,puppetlabs/puppet-server,puppetlabs/puppetserver,puppetlabs/puppet-server