[TEMP] use staging repos

spec/setup_acceptance_node.pp

@@ -2,6 +2,15 @@
   repo => 'nightly',
 }
 
+apt::source { 'foreman-staging':
+  repos    => 'theforeman-nightly',
+  location => 'https://stagingdeb.theforeman.org/',
+  include  => {
+    src => false,
+  },
+  require  => Apt::Key['foreman'],
+}
+
 # Not /etc/foreman because purging removes that
 $directory = '/etc/foreman-certs'
 $certificate = "${directory}/certificate.pem"