unified: Add a dummy query

This is just to test DCA

unified/ql/src/DummyQuery.ql

@@ -0,0 +1,14 @@
+/**
+ * @name Dummy query
+ * @description Dummy query that flags any name longer than 20 characters
+ * @kind problem
+ * @id unified/dummy
+ * @problem.severity info
+ * @precision low
+ */
+
+import unified
+
+from Identifier id
+where id.getValue().length() > 20
+select id, "Name is too long: " + id.getValue()