Added warning and critical levels.

plugins/other/rabbitmq_list_queues

@@ -16,6 +16,8 @@ proc main {argc argv} {
 		    set clean [clean_fieldname $q]
 		    puts "$clean.label $q"
 		    puts "$clean.draw LINE3"
+                    puts "$clean.warning 300000"
+                    puts "$clean.critical 700000"
 		}
 	    }
 	    "autoconf" {