ITL: Add timeout option for mysql_health CheckCommand

fixes #13431

doc/10-icinga-template-library.md

@@ -2045,6 +2045,7 @@ mysql_health_negate              | **Optional.** Emulate the negate plugin. --ne
 mysql_health_withmymodulesdyndir | **Optional.** Add-on modules for the my-modes will be searched in this directory."
 mysql_health_statefilesdir       | **Optional.** An alternate directory where the plugin can save files."
 mysql_health_isvalidtime         | **Optional.** Signals the plugin to return OK if now is not a valid check time."
+mysql_health_timeout           	 | **Optional.** Plugin timeout. Defaults to 60s.
 
 #### <a id="plugin-contrib-command-oracle_health"></a> oracle_health
 

itl/plugins-contrib.d/databases.conf

@@ -238,6 +238,10 @@ object CheckCommand "mysql_health" {
 			value = "$mysql_health_isvalidtime$"
 			description = "Signals the plugin to return OK if now is not a valid check time."
 		}
+		"--timeout" = {
+			value = "$mysql_health_timeout$"
+			description = "plugin timeout. Default is 60 seconds"
+		}
 	}
 
 	vars.mysql_health_hostname = "$check_address$"