Fixed bug that failed test 'set level on all categories'

lib/log4js.js

@@ -240,13 +240,13 @@ function configureLevels(_levels) {
     var keys = Object.keys(levels.config).sort();
     for (var idx in keys) {
       var category = keys[idx];
+      if(category === ALL_CATEGORIES) {
+        setGlobalLogLevel(_levels[category]);
+      }        
       for(var loggerCategory in loggers) {
         if (doesLevelEntryContainsLogger(category, loggerCategory)) {
           loggers[loggerCategory].setLevel(_levels[category]);
         }
-        if(category === ALL_CATEGORIES) {
-          setGlobalLogLevel(levels[category]);
-        }        
       }
     }
   }