Initial creation of a combined rackspace auth identity filter

Along the lines of ip-identity, but specifically for rackspace's auth
token posting logic.
Implemented json and XML parsing of the payloads to get back usernames

There are tests for the payloads that I can think of we could possibly
want to rate limit on.

I think we'll need better requirements regarding how to handle the
myriad ways to authenticate in v2.0
Got a couple simple unit tests passing.

Managed to avoid mocking most of the world.

Now lets go theif some integration tests.
Adding it to the filter-bundle

Eventually, it should go somewhere external
Actually do the quality setting correctly. Sneaky Sneaky java methods
Add a couple rackspace auth identity tests

It could use a lot more, but the filter works :D
Yep, my stuff is in maven central
Removing the dependency management dumbness
Better named function
So only release 3.4.0-M1 is on maven central
A bit of clean up, and handling the LimitedRead thingy like it's handled
elsewhere

I don't really like this thing, but it's used elsewhere, and it's
behavior is tested...

It required that I delete the "integration" test I was using for the
filter, because the input stream cannot be reset :(
Took out mockrunner, because it's not useful
Tweaks to make it work