MXS-2458: add template for Clustrix monitor tests

First implementation of Clustrix setup creation
TODO: move Clustrix installation to MDBCI

maxscale-system-test/clustrix_nodes.h

@@ -0,0 +1,51 @@
+/**
+ * @file clustrix_nodes.h - work with Clustrix setup
+ *
+ * ~/.config/mdbci/clustrix_license file have to contain SQL
+ * which setups license to the Clustrix node
+ *
+ * TODO: move functionality of install_clustrix() to MDBCI
+ */
+
+
+
+#pragma once
+
+#include <errno.h>
+#include <string>
+#include "nodes.h"
+#include "mariadb_nodes.h"
+
+#define CLUSTRIX_DEPS_YUM "yum install -y bzip2 wget screen ntp ntpdate vim htop mdadm"
+#define WGET_CLUSTRIX     "wget http://files.clustrix.com/releases/software/clustrix-9.1.4.el7.tar.bz2"
+#define UNPACK_CLUSTRIX   "tar xvjf clustrix-9.1.4.el7.tar.bz2"
+#define INSTALL_CLUSTRIX  "cd clustrix-9.1.4.el7; sudo ./clxnode_install.py --yes --force"
+
+class Clustrix_nodes : public Mariadb_nodes
+{
+public:
+
+    Clustrix_nodes(const char* pref, const char* test_cwd, bool verbose, std::string network_config)
+        : Mariadb_nodes(pref, test_cwd, verbose, network_config)
+    {
+    }
+
+    /**
+     * @brief install_clustrix
+     * @param m node index
+     * @return 0 in case of success
+     */
+    int install_clustrix(int m);
+
+    /**
+     * @brief start_cluster Intstalls Clustrix on all nodes, configure license, form cluster
+     * @return 0 in case of success
+     */
+    int start_cluster();
+
+    /**
+     * @brief cnf_servers Generate Clustrix servers description for maxscale.cnf
+     * @return text for maxscale.cnf
+     */
+    std::string cnf_servers();
+};