riak_test for proxy_get + EE 1.4

https://github.com/basho/riak_repl/pull/228
https://github.com/basho/riak_ee/pull/127

This test can take ~30 minutes to run. I recommend the following steps for proper enjoyment:
1) start the test
2) go out and get a beer (or even go Full Big Nosk)
3) put in a good movie, such as Big Trouble in Little China, Alien, or the first season of Arrested Development
4) Periodically check in on the test
5) If things look good, eat a burrito, mozzarella sticks, or MAYBE that breakfast that the hotel in Denver served us every morning.

cc @seancribbs - once merged, this will need the GiddyUp treatment