Fix compilation issues

32ff140 made ports and hostnames
mandatory but left the code base not compiling. Fixed.

Author: shs96c

java/client/test/com/thoughtworks/selenium/testing/SeleniumAppServer.java

@@ -27,6 +27,10 @@ public class SeleniumAppServer extends JettyAppServer {
 
   private static final String RC_CONTEXT_PATH = "/selenium-server";
 
+  public SeleniumAppServer() {
+    this(detectHostname(), getHttpPortFromEnv(), getHttpsPortFromEnv());
+  }
+
   public SeleniumAppServer(String hostname, int httpPort, int httpsPort) {
     super(hostname, httpPort, httpsPort);
     ServletContextHandler context = addResourceHandler(RC_CONTEXT_PATH, findRootOfRcTestPages());