Add runner token to gitlab.rb

Author: RicePatrick

scripts/gitlab.rb

@@ -7,3 +7,5 @@
 registry['enable']                    = true
 registry_nginx['ssl_certificate']     = "/etc/gitlab/ssl/gitlab-registry.pem"
 registry_nginx['ssl_certificate_key'] = "/etc/gitlab/ssl/gitlab-registry.key"
+
+gitlab_rails['initial_shared_runners_registration_token'] = "LoremIpsumDolorToken"