Some test fixes:

- ensure the default port used for itests is something different than 8080, to
  check whether all code is using the correct constant;
- fixed two failing itests that did not correctly configure the right port;
- made the discovery test more robust when testing the fallback to the default
  server URL.



git-svn-id: https://svn.apache.org/repos/asf/ace/trunk@1586517 13f79535-47bb-0310-9956-ffa450edef68