cleanup some comments and add missing overrides

(cherry picked from commit e593d43)

Author: kares

src/main/java/org/jruby/rack/DefaultRackConfig.java

@@ -195,12 +195,6 @@ protected RackLogger createLogger(final String loggerClass) {
                 throw new RackException("could not create logger: '" + loggerClass + "'", e.getTargetException());
             }
         }
-        //catch (ClassNotFoundException e) {
-        //    if ( ! isQuiet() ) {
-        //        err.println("failed creating logger: '" + loggerClass + "'");
-        //        e.printStackTrace(err);
-        //    }
-        //}
         catch (Exception e) {
             if ( ! isQuiet() ) {
                 err.println("failed creating logger: '" + loggerClass + "'");

src/main/java/org/jruby/rack/RackContext.java

@@ -13,7 +13,7 @@
  * @author nicksieger
  */
 public interface RackContext extends RackLogger {
-    RackConfig getConfig(); /// NOTE: deprecate ?
+    RackConfig getConfig();
     String getServerInfo();
     // TODO more methods from ServletContext here ?!
 }

src/main/java/org/jruby/rack/RackServletContextListener.java

@@ -39,6 +39,7 @@ public RackServletContextListener() {
         this.factory = factory;
     }
 
+    @Override
     public void contextInitialized(final ServletContextEvent event) {
         final ServletContext context = event.getServletContext();
         final ServletRackConfig config = new ServletRackConfig(context);
@@ -54,6 +55,7 @@ public void contextInitialized(final ServletContextEvent event) {
         }
     }
 
+    @Override
     public void contextDestroyed(final ServletContextEvent event) {
         final ServletContext context = event.getServletContext();
         final RackApplicationFactory factory =