MXS-2243 System tests brings VMs by themselves (#193)

maxscale-system-test changed in order to control test environment by itself.
Every test checks which machines are running, compare with list of needed machines
and start new VMs is they are missing in the running machines list.
Tests are executiong MDBCI commands, MDBCI executable should be in the PATH

maxscale-system-test/mariadb_nodes.h

@@ -1,5 +1,4 @@
-#ifndef MARIADB_NODES_H
-#define MARIADB_NODES_H
+#pragma once
 
 /**
  * @file mariadb_nodes.h - backend nodes routines
@@ -36,7 +35,7 @@ public:
      * @brief Constructor
      * @param pref  name of backend setup (like 'repl' or 'galera')
      */
-    Mariadb_nodes(const char* pref, const char* test_cwd, bool verbose);
+    Mariadb_nodes(const char *pref, const char *test_cwd, bool verbose, std::string network_config);
 
     virtual ~Mariadb_nodes();
 
@@ -55,20 +54,20 @@ public:
     /**
      * @brief Unix socket to connecto to MariaDB
      */
-    char socket[256][1024];
+    char * socket[256];
     /**
      * @brief 'socket=$socket' line
      */
-    char socket_cmd[256][1024];
+    char * socket_cmd[256];
 
     /**
      * @brief   User name to access backend nodes
      */
-    char user_name[256];
+    char * user_name;
     /**
      * @brief   Password to access backend nodes
      */
-    char password[256];
+    char * password;
     /**
      * @brief master index of node which was last configured to be Master
      */
@@ -77,18 +76,18 @@ public:
     /**
      * @brief start_db_command Command to start DB server
      */
-    char start_db_command[256][4096];
+    char * start_db_command[256];
 
     /**
      * @brief stop_db_command Command to start DB server
      */
-    char stop_db_command[256][4096];
+    char * stop_db_command[256];
 
     /**
      * @brief cleanup_db_command Command to remove all
      * data files and re-install DB with mysql_install_db
      */
-    char cleanup_db_command[256][4096];
+    char * cleanup_db_command[256];
 
     /**
      * @brief ssl if true ssl will be used
@@ -380,7 +379,7 @@ public:
      * Only works with master-slave replication and should not be used with Galera clusters.
      * The function expects that the first node, @c nodes[0], is the master.
      */
-    void sync_slaves(int node = 0);
+    virtual void sync_slaves(int node = 0);
 
     /**
      * @brief Close all connections to this node
@@ -487,10 +486,8 @@ class Galera_nodes : public Mariadb_nodes
 {
 public:
 
-    Galera_nodes(const char* pref, const char* test_cwd, bool verbose)
-        : Mariadb_nodes(pref, test_cwd, verbose)
-    {
-    }
+    Galera_nodes(const char *pref, const char *test_cwd, bool verbose, std::string network_config) :
+        Mariadb_nodes(pref, test_cwd, verbose, network_config) { }
 
     int start_galera();
 
@@ -507,6 +504,9 @@ public:
     }
 
     std::string get_config_name(int node) override;
-};
 
-#endif      // MARIADB_NODES_H
+    virtual void sync_slaves(int node = 0)
+    {
+        sleep(10);
+    }
+};