Moved common monitor structures and definitions to a separate header and added master down script to galeramon.

server/include/mon_exec.h

@@ -0,0 +1,19 @@
+#ifndef MON_EXEC_HG
+#define MON_EXEC_HG
+
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <skygw_utils.h>
+#include <log_manager.h>
+#define MAXSCALE_EXTCMD_ARG_MAX 256
+
+typedef struct extern_cmd_t{
+  char* parameters[MAXSCALE_EXTCMD_ARG_MAX]; /*< Command arguments */
+  int n_exec; /*< Number of times executed */
+}EXTERNCMD;
+
+EXTERNCMD* externcmd_allocate(char* argstr);
+void externcmd_free(EXTERNCMD* cmd);
+int externcmd_execute(EXTERNCMD* cmd);
+#endif