title: Updating analyzer within ElasticSearch settings
body: <p>I'm using Sense (Chrome plugin) and I've managed to setup an analyzer and it is working correctly.  If I issue a GET (/media/_settings) on the settings the following is returned.</p>
  
  <pre><code>{
     "media": {
        "settings": {
           "index": {
              "creation_date": "1424971612982",
              "analysis": {
                 "analyzer": {
                    "folding": {
                       "filter": [
                          "lowercase",
                          "asciifolding"
                       ],
                       "tokenizer": "standard"
                    }
                 }
              },
              "number_of_shards": "5",
              "uuid": "ks98Z6YCQzKj-ng0hU7U4w",
              "version": {
                 "created": "1040499"
              },
              "number_of_replicas": "1"
           }
        }
     }
  }
  </code></pre>
  
  <p>I am trying to update it by doing the following:</p>
  
  <p>Closing the index</p>
  
  <p>Issuing this PUT command (removing a filter)</p>
  
  <pre><code>PUT /media/_settings
  {
    "settings": {
      "analysis": {
        "analyzer": {
          "folding": {
            "tokenizer": "standard",
            "filter":  [ "lowercase" ]
          }
        }
      }
    }
  }
  </code></pre>
  
  <p>Opening the index</p>
  
  <p>But when the settings come back, the filter is not removed.  Can you not update an analyzer once you've created it?</p>