New "with_random_choice" lookup plugin

It may be that you desire to introduce a degree of randomness into
your executions. One example of this is you may have a selection of
mirrors you want to choose semi-fairly between. Another, is you might
have been inspired by Chaos Monkey, and want to keep your network
administrators on their toes!

I've added a new plugin that allows just this:

On that note, I've started a small project on github to reimplement
the bits of chaos monkey that I find useful, in python. It's written
with an eye to using it as an ansible module, (though not limited to
that) Currently it can kill a random pid pretty well, adding more
monkey flinging poo options as time goes by. If anyone is interested.

https://github.com/weaselkeeper/UsefulIdiot.git

Apologies if this is considered off topic.

Totally not.

When I first saw that I was thinking, "darn, too bad it's EC2 specific".

Incidentally I was going to write a cobbler module, you'll be able to
flip power with it and stuff.

Fence module should probably be seperate and slightly redundant.
Going to do that too, but much groundwork has been done there with
cobbler power integration so it's cake.

--Michael