Add tests from develop

Added tests from develop. The test results need to be modified for 2.0.

maxscale-system-test/create_rds.cpp

@@ -0,0 +1,17 @@
+/**
+ * @file create_rds.cpp Creates RDS Aurora cluster with 4 instances
+ * Creates VPC, subnets, subnets group, internet gateway, routing table, routes, configure security group
+ * In case of any error tries to remove all created stuff
+ */
+
+#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");
+    return cluster->create_rds_db(4);
+}