catalog: Implement Sync Update Executor

Change-Id: I88a0c6935d7b8094dfb587e83270a607e753ea31
refs: #2611
diff --git a/tools/publish-files.json.example b/tools/publish-files.json.example
new file mode 100644
index 0000000..28727cd
--- /dev/null
+++ b/tools/publish-files.json.example
@@ -0,0 +1,5 @@
+{
+    "add": ["/CMIP5/t/t/t/t/t/t/t/t/t8-11"],
+    "remove": ["/CMIP5/a/b/c/d/e/f/g/h/i",
+               "/CMIP5/1/2/3/4/5/6/7/8/9"]
+}