Range results order flipped, need to update HTTPANN

[harsha-simhadri]

@alexklibisz Since FAISS used D,I order to return range search results, in a recent commit, I changed the range search result return order in the base ANN class to D,I.

Please consider updating HttpANN class as well.

[alexklibisz]

Interesting. How did the tests still pass? Do they not check this?

[harsha-simhadri]

Hmm, it did pass. Let me see what happened here.