Fix to allow JaggeryServerTest to work with 4.3.0 WebAppAdmin stub

This commit changes the WebAppAdmin stub version to 4.3.0-SNAPSHOT version.In addition it changes the getStartedWebapp invocation to work with the changes to its method signature.The 4.3.0 version of the method accepts both the appName as well as a host name.The fix invokes the hostname as the ip.