Fix http-builder dependency

In c49be4d2ffa2d5aa6b3f6155b19a69485fd43a10 accidentally (I thought) dependency to http-builder-0.5.1 was replaced with 0.4.1 (you can see removed lib/http-builder-0.5.1.jar). It brokes some http requests working previously (i.e. request with array parameter).
In http-builder 0.4.1:
[id: Arrays.asList(1, 2, 3)] produces id=[1, 2, 3]
In http-builder 0.5.1:
[id: Arrays.asList(1, 2, 3)] produces id=1&id=2&id=3
This commit reverts http-builder dependency to original state.