DATAES-84 - Add field criteria with searchQuery not supported in scan and scroll

- added support for fields in scan and scroll
- fixed build failure, separated aliasTests

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

@@ -443,6 +443,10 @@ public class ElasticsearchTemplate implements ElasticsearchOperations {
 			requestBuilder.setPostFilter(searchQuery.getFilter());
 		}
 
+		if(isNotEmpty(searchQuery.getFields())) {
+			requestBuilder.addFields(toArray(searchQuery.getFields()));
+		}
+
 		if (noFields) {
 			requestBuilder.setNoFields();
 		}