Update configs to use 1.4.0 branches and code [Don't Merge]

*This PR isn't ready to be merged*

Update yokozuna to work against the 1.4 master changes. This branch relies on:

* [KV yz-merge-1.4.0 branch](https://github.com/basho/riak_kv/compare/yz-merge-1.4.0)
* [Riak yz-merge-1.4.0 branch](https://github.com/basho/riak/compare/yz-merge-1.4.0)

NOTE: These test still fail for me

* yz_pb-bitcask
* yz_mapreduce-bitcask
* yz_flag_transitions-bitcask