DATAES-741 / Tests fail due to Elasticsearch cluster 'blocks' on nearly-full file-systems.

Original PR: spring-projects#393

Author: rpuch

src/test/java/org/springframework/data/elasticsearch/Utils.java

@@ -30,6 +30,7 @@
  * @author Artur Konczak
  * @author Ilkang Na
  * @author Peter-Josef Meisch
+ * @author Roman Puchkovskiy
  */
 public class Utils {
 
@@ -46,6 +47,11 @@ public static Node getNode() {
 						.put("path.data", pathData) //
 						.put("cluster.name", clusterName) //
 						.put("node.max_local_storage_nodes", 100)//
+						// the following 3 settings are needed to avoid problems on big, but
+						// almost full filesystems, see DATAES-741
+						.put("cluster.routing.allocation.disk.watermark.low", "1gb")//
+						.put("cluster.routing.allocation.disk.watermark.high", "1gb")//
+						.put("cluster.routing.allocation.disk.watermark.flood_stage", "1gb")//
 						.build(), //
 				Collections.singletonList(Netty4Plugin.class));
 	}