Extend use of reflection for port in Jetty 9

There was already a reflection hack in place for logging the local
port in Jetty 8/9. It wasn't being used for the getPort() method
for some reason, so that needed to be fixed.

Fixes gh-635

spring-boot/src/main/java/org/springframework/boot/context/embedded/jetty/JettyEmbeddedServletContainer.java

@@ -103,15 +103,16 @@ public class JettyEmbeddedServletContainer implements EmbeddedServletContainer {
 		}
 	}
 
-	private String getLocalPort(Connector connector) {
+	private Integer getLocalPort(Connector connector) {
 		try {
 			// Jetty 9 internals are different, but the method name is the same
-			return ((Integer) ReflectionUtils.invokeMethod(
+			return (Integer) ReflectionUtils.invokeMethod(
 					ReflectionUtils.findMethod(connector.getClass(), "getLocalPort"),
-					connector)).toString();
+					connector);
 		}
 		catch (Exception ex) {
-			return "could not determine port ( " + ex.getMessage() + ")";
+			this.logger.info("could not determine port ( " + ex.getMessage() + ")");
+			return 0;
 		}
 	}
 
@@ -134,7 +135,7 @@ public class JettyEmbeddedServletContainer implements EmbeddedServletContainer {
 		Connector[] connectors = this.server.getConnectors();
 		for (Connector connector : connectors) {
 			// Probably only one...
-			return connector.getLocalPort();
+			return getLocalPort(connector);
 		}
 		return 0;
 	}