Issue #1602 - Reverting AbstractLifeCycle changes per review

jetty-util/src/main/java/org/eclipse/jetty/util/component/AbstractLifeCycle.java

@@ -206,7 +206,7 @@ public abstract class AbstractLifeCycle implements LifeCycle
             listener.lifeCycleStopped(this);
     }
 
-    protected void setFailed(Throwable th)
+    private void setFailed(Throwable th)
     {
         _state = __FAILED;
         if (LOG.isDebugEnabled())

jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppContext.java

@@ -553,8 +553,7 @@ public class WebAppContext extends ServletContextHandler implements WebAppClassL
             // start up of the webapp context failed, make sure it is not started
             LOG.warn("Failed startup of context "+this, t);
             _unavailableException=t;
-            setAvailable(false); // webapp cannot be accessed
-            setFailed(t); // be a proper Jetty LifeCycle participant and notify listeners of failure
+            setAvailable(false); // webapp cannot be accessed (results in status code 503)
             if (isThrowUnavailableOnStartupException())
                 throw t;
         }