Apply correct ordering in logging system on startup

Completes the work started in 7f687b1, where the call to
LoggingSystem.beforeInitialization() was ommitted which results
in JUL logging never being available in the application.

Partial fix for spring-projects#131 (but a /refresh is still broken)

Author: Dave Syer

spring-cloud-context/src/main/java/org/springframework/cloud/bootstrap/BootstrapApplicationListener.java

@@ -85,11 +85,18 @@ public void onApplicationEvent(ApplicationEnvironmentPreparedEvent event) {
 		ConfigurableApplicationContext context = bootstrapServiceContext(environment,
 				event.getSpringApplication());
 		apply(context, event.getSpringApplication(), environment);
+		shutdownLogging();
+	}
+
+	private void shutdownLogging() {
 		// Clean up the logging system. Logging will go dark until the
 		// ConfigFileApplicationListener fires, but this is the price we pay for that
 		// listener being able to adjust the log levels according to what it finds in its
 		// own configuration.
-		LoggingSystem.get(ClassUtils.getDefaultClassLoader()).cleanUp();
+		LoggingSystem loggingSystem = LoggingSystem
+				.get(ClassUtils.getDefaultClassLoader());
+		loggingSystem.cleanUp();
+		loggingSystem.beforeInitialize();
 	}
 
 	private ConfigurableApplicationContext bootstrapServiceContext(