title: Traefik is using default cert even though acme.json file is generated correctly
body: <p>I'm running into an odd issue using Traefik. I'd like to use ACME to generate TLS certs. My <em>acme.json</em> file seems to be getting populated correctly after performing verification using DNS, however, when I use OpenSSL to verify the cert, it appears to be using the default certificate provided by Traefik. </p>
  
  <p>These are my settings:</p>
  
  <pre><code>[acme]
  acmelogging= true
  caServer = "https://acme-staging-v02.api.letsencrypt.org/directory"
  delayBeforeCheck = 0
  email = "&lt;REDACTED&gt;"
  entryPoint = "https"
  storage = "/etc/traefik/acme.json"
    [acme.dnsChallenge]
    delayBeforeCheck = 0
    provider = "route53"
    [[acme.domains]]
    main = "&lt;REDACTED&gt;"
  </code></pre>
  
  <pre><code>[entryPoints]
    [entryPoints.http]
    address = ":80"
      [entryPoints.http.redirect]
      entryPoint = "https"
    [entryPoints.https]
      address = ":443"
      [entryPoints.https.tls]
  </code></pre>
  
  <p>And here's the subject of the certificate:</p>
  
  <pre><code>➜  Docker git:(master) ✗ openssl s_client -connect localhost:443 -servername &lt;REDACTED&gt; 2&gt;/dev/null | openssl x509 -noout -subject
  
  subject= /CN=TRAEFIK DEFAULT CERT
  </code></pre>