Also generate a certificate for openshift_hosted_registry_routehost

Users can specify a custom hostname for the docker registry route.
We need to have the certificate match that host if it is specified
so that you can use docker commands against that host.

roles/openshift_hosted/tasks/registry/secure.yml

@@ -55,6 +55,7 @@
     - "{{ docker_registry_service_ip.results.clusterip }}"
     - "{{ openshift_hosted_registry_name }}.default.svc"
     - "{{ openshift_hosted_registry_name }}.default.svc.{{ openshift.common.dns_domain }}"
+    - "{{ openshift_hosted_registry_routehost | default(omit) }}"
     - "{{ docker_registry_route_hostname }}"
     cert: "{{ openshift_master_config_dir }}/registry.crt"
     key: "{{ openshift_master_config_dir }}/registry.key"