Removed duplicate host param.

roles/openshift_hosted/tasks/registry/secure.yml

@@ -23,7 +23,6 @@
     name: docker-registry
     namespace: "{{ openshift_hosted_registry_namespace }}"
     service_name: docker-registry
-    host: "{{ docker_registry_route_hostname }}"
     tls_termination: "{{ openshift_hosted_registry_route_termination }}"
     host: "{{ openshift_hosted_registry_route_host | default(docker_registry_route_hostname) }}"
     cert_path: "{{ ('certfile' in openshift_hosted_registry_route_certificates) | ternary('/etc/origin/master/named_certificates/' ~ (openshift_hosted_registry_route_certificates.certfile | basename), omit) }}"