Bulk API: _version on delete actions is not honored, closes elastic#1156.

Author: kimchy

modules/elasticsearch/src/main/java/org/elasticsearch/action/bulk/BulkRequest.java

@@ -145,7 +145,7 @@ public BulkRequest add(byte[] data, int from, int length, boolean contentUnsafe)
             }
 
             if ("delete".equals(action)) {
-                add(new DeleteRequest(index, type, id).parent(parent).versionType(versionType).routing(routing));
+                add(new DeleteRequest(index, type, id).parent(parent).version(version).versionType(versionType).routing(routing));
             } else {
                 nextMarker = findNextMarker(marker, from, data, length);
                 if (nextMarker == -1) {