title: Setting not_analyzed for a property in Nest 5.5.0
body: <p>I have tried to set the "not_analyzed" index type via Nest 5.5.0 and I have no idea how to do it.</p>
  
  <p>My init:</p>
  
  <pre><code>var map = new CreateIndexDescriptor(INDEX_NAME)
       .Mappings(ms =&gt; ms.Map&lt;Project&gt;(m =&gt; m.AutoMap()));
  
  var connectionSettings = new ConnectionSettings().DefaultIndex(INDEX_NAME);
  _client = new ElasticClient(connectionSettings);
  
  _client.Index(map);
  </code></pre>
  
  <p>And the Project class:</p>
  
  <pre><code>[ElasticsearchType(Name = "project")]
  public class Project
  {
      public Guid Id { get; set; }
      [Text(Analyzer = "not_analyzed")]
      public string OwnerIdCode { get; set; }
  }
  </code></pre>
  
  <p>This way of init creates some kind of weird mapping after I invoke the index/_mapping REST via Postman. There is the normal "mappings" JSON section, and just below "createindexdescriptor" with almost the same data. </p>
  
  <pre><code>"examinations4": {
      "mappings": {
          "project": {
              (...)
          },
          "createindexdescriptor": {
              "properties": {
                  "mappings": {
                      "properties": {
                          "project": {
                              "properties": {
                                  "properties": {
                                      "properties": {
                                          "id": {
                                              "properties": {
                                                  "type": {
                                                      "type": "text",
                                                      "fields": {
                                                          "keyword": {
                                                              "type": "keyword",
                                                              "ignore_above": 256
                                                          }
                                                      }
                                                  }
                                              }
                                          },
                                          "ownerIdCode": {
                                              "properties": {
                                                  "analyzer": {
                                                      "type": "text",
                                                      "fields": {
                                                          "keyword": {
                                                              "type": "keyword",
                                                              "ignore_above": 256
                                                          }
                                                      }
                                                  },
                                                  "type": {
                                                      "type": "text",
                                                      "fields": {
                                                          "keyword": {
                                                              "type": "keyword",
                                                              "ignore_above": 256
                                                          }
   (...)
  </code></pre>