modified to randomize URL used on each request

This code includes a script to get maven if needed (not sure I'm going to use it), a script that must be run on awstest to get the instance-ids and hosts for a given cluster, and then code to randomly select from the hosts on that list for ws-mock testing.

There are still some to-dos on this, but I figured I can use the pull request mechanism as a form of code review for this change and continue working on the same branch.