Update qless-core to latest version

[bslobodin]

We have run into issues with latest Redis in dev up, this PR updates the qless-core lua scripts as per seomoz/qless-core#64.

git submodule init
git submodule update --remote --merge
make qless.lua
make qless-lib.lua

[melari]

👍

[cyprusad]

I didn't get to top hat unfortunately

[girasquid]

👍 - reading all of these or falses makes me think that there's an argument to be made for a helper method here, but this works

[bslobodin]

@girasquid perhaps, though we never modified qless-core with our fork, this was simply bringing the current version of that submodule into our outer fork...

[girasquid]

Yeah - that works!