Add option to select port for rgw exporter

Author: seunghun1ee

etc/kayobe/ansible/deploy-radosgw-usage-exporter.yml

@@ -82,6 +82,7 @@
           ADMIN_ENTRY: admin
           ACCESS_KEY: "{{ ec2.Access }}"
           SECRET_KEY: "{{ ec2.Secret }}"
+          VIRTUAL_PORT: "{{ stackhpc_radosgw_usage_exporter_port | string }}"
         entrypoint: "{{ [ 'python', '-u', './radosgw_usage_exporter.py', '--insecure' ] if not stackhpc_radosgw_usage_exporter_verify else omit }}"
       vars:
         ec2: "{{ credential.stdout | from_json | first }}"