Container Support

When creating a docker remote with a ssl_client_certificate and ssl_client_key, the sync seems to ignore them. Here's the remote i created:

{
   "count":1,
   "next":null,
   "previous":null,
   "results":[
      {
         "_href":"/pulp/api/v3/remotes/docker/docker/c32d31d2-f984-4baf-b5e1-d23b83ead9f8/",
         "_created":"2019-09-06T19:21:13.772540Z",
         "_type":"docker.docker",
         "name":"1-docker_sync_test-docker-2e6664ad-e565-4d26-88f6-c2d9104c37e5",
         "url":"https://devel.localhost.example.com",
         "ssl_ca_certificate":"2d85b0335c442e9c2b3ec6e6a3eebf168a76731d773587b53567554367cb3236",
         "ssl_client_certificate":"3d621f0c311fc3c595698049cbcd32d6f0ae5cb29a936eb4c9daa583593cb5c2",
         "ssl_client_key":"3920d22ec4ff2d804a7ae0838ad2b1b1959f906ce2244690a144d00e462ff13f",
         "ssl_validation":true,
         "proxy_url":null,
         "_last_updated":"2019-09-06T19:32:11.946413Z",
         "download_concurrency":20,
         "policy":"immediate",
         "upstream_name":"default_organization-docker-docker_sync_test-docker_pulp3-capsule_test",
         "whitelist_tags":null
      }
   ]
}

but when i sync, it doesn't appear to use the configured certs