WIP Add new client to test revoke (not working)

Add a new client with an additional revoke test. Unfortunately I was not
able to get the tests working. Command to start the test is:

`PUPPET_INSTALL_TYPE=agent BEAKER_IS_PE=no BEAKER_PUPPET_COLLECTION=puppet5 BEAKER_debug=true BEAKER_setfile=ubuntu1804-64vpnserver.ma{hostname=vpnserver}-ubuntu1804-64vpnclienta.a{hostname=vpnclienta} BEAKER_HYPERVISOR=docker LANG=C LC_ALL=C  bundle exec rake beaker`

It looks like, there weren't any revoke tests yet. So as I'm new to
puppet I was not able to create revoking tests from scratch in a
reasonable time.

spec/acceptance/openvpn_spec.rb

@@ -36,6 +36,7 @@
       apply_manifest_on(hosts_as('vpnserver'), pp, catch_failures: true)
       apply_manifest_on(hosts_as('vpnserver'), pp, catch_changes: true)
     end
+
     it 'creates openvpn client certificate idempotently' do
       pp = %(
         openvpn::server { 'test_openvpn_server':
@@ -56,7 +57,18 @@
           remote_host => $facts['networking']['ip'],
           tls_cipher  => 'TLS-DHE-RSA-WITH-AES-128-GCM-SHA256:TLS-DHE-RSA-WITH-AES-128-CBC-SHA',
         }
-      )
+
+  openvpn::client { 'vpnclientb' :
+          server      => 'test_openvpn_server',
+          require     => Openvpn::Server['test_openvpn_server'],
+          remote_host => $facts['networking']['ip'],
+          tls_cipher  => 'TLS-DHE-RSA-WITH-AES-128-GCM-SHA256:TLS-DHE-RSA-WITH-AES-128-CBC-SHA',
+        }
+
+  openvpn::revoke { 'vpnclientb' :
+          server      => 'test_openvpn_server',
+        }
+       )
       apply_manifest_on(hosts_as('vpnserver'), pp, catch_failures: true)
       apply_manifest_on(hosts_as('vpnserver'), pp, catch_changes: true)
     end