By default, the replicator is started on port 27182. Use resmoke's ability to get a new port to set the port instead, otherwise multiple replicators cannot run on the same machine as they can't bind to the same port.

This can be fixed by setting the --port CLI option when the ClusterToClusterFixture is set up. To get a port that is not in use, we can ask resmoke to give us one.

See comments for example patch build.