Update mapper-attachment version

Author: richardwilly98

src/test/resources/settings.yml

@@ -22,7 +22,7 @@ cluster:
 	name: es-test-cluster
 
 plugins:
-  mapper-attachments: elasticsearch/elasticsearch-mapper-attachments/1.8.0
+  mapper-attachments: elasticsearch/elasticsearch-mapper-attachments/1.9.0
   lang-javascript: elasticsearch/elasticsearch-lang-javascript/1.4.0
   lang-groovy: elasticsearch/elasticsearch-lang-groovy/1.5.0