DATAES-140 add value "no" in Enum FieldIndex.

Author: avolz

src/main/java/org/springframework/data/elasticsearch/annotations/FieldIndex.java

@@ -18,7 +18,9 @@
 /**
  * @author Artur Konczak
  * @author Mohsin Husen
+ * @author Alexander Volz
+ * @author Dennis Maaß
  */
 public enum FieldIndex {
-	not_analyzed, analyzed
+	not_analyzed, analyzed, no
 }

src/main/java/org/springframework/data/elasticsearch/core/MappingBuilder.java

@@ -41,6 +41,8 @@
  * @author Mohsin Husen
  * @author Artur Konczak
  * @author Kevin Leturc
+ * @author Alexander Volz
+ * @author Dennis Maaß
  */
 
 class MappingBuilder {
@@ -208,7 +210,7 @@ private static void addSingleFieldMapping(XContentBuilder xContentBuilder, java.
 						? fieldAnnotation.pattern() : fieldAnnotation.format());
 			}
 		}
-		if (FieldIndex.not_analyzed == fieldAnnotation.index()) {
+		if (FieldIndex.not_analyzed == fieldAnnotation.index() || FieldIndex.no == fieldAnnotation.index()) {
 			xContentBuilder.field(FIELD_INDEX, fieldAnnotation.index().name().toLowerCase());
 		}
 		if (isNotBlank(fieldAnnotation.searchAnalyzer())) {