Changed callable monitor scripts to be called with command line parameters instead of having multiple scripts.

This reduces the amount of guesswork the monitor has to do when executing the script and places that burden on the called script.

server/modules/monitor/mysqlmon.h

@@ -56,7 +56,7 @@ typedef struct {
 	int	availableWhenDonor;	/**< Monitor flag for Galera Cluster Donor availability */
         int     disableMasterRoleSetting; /**< Monitor flag to disable setting master role */
 	MONITOR_SERVERS *master;	/**< Master server for MySQL Master/Slave replication */
-        EXTERNCMD* master_down_script;
+        char* script; /*< Script to call when state changes occur on servers */
 } MYSQL_MONITOR;
 
 #endif