MXS-2900 Rename maxscale-system-test directory to system-test

A link with the old directory name is provided.

system-test/delete_rds.cpp

@@ -0,0 +1,16 @@
+/**
+ * @file delete_rds.cpp Destroys RDS Aurora cluster
+ * Creates VPC, subnets, subnets group, internet gateway, routing table, routes, DB instances
+ */
+
+#include <iostream>
+#include <unistd.h>
+#include "testconnections.h"
+#include <jansson.h>
+#include "rds_vpc.h"
+
+int main(int argc, char* argv[])
+{
+    RDS* cluster = new RDS((char*) "auroratest");
+    cluster->delete_rds_cluster();
+}