Update git submodules

* Update openstack-helm-infra from branch 'master'
  to 5cbce03f21cea3e6d1041afb6739280fb57e29f4
  - Enable management api metrics collection
    
    The default rabbitmq image disables metrics collection via the management
    api. This is implemented by adding a file named:
    
    /etc/rabbitmq/conf.d/management_agent.disable_metrics_collector.conf
    
    with the contents:
    
    management_agent.disable_metrics_collector = true
    
    The prometheus exporter currently used by osh requires this value to be
    false.
    
    This change was introduced when rabbit introduced the integrated
    prometheus exporter:
    
    docker-library/rabbitmq#419
    
    Change-Id: I9a94f49a7827bb4725ed3fd98404e637bfefa086