Rtb 1768 hologram hack day

Merges from master `erlcloud` into SemanticSugar fork:

We needed this for `hologram` support -> parent fork contains metadata service querying logic that is leveraged across all the individual AWS api integrations.

Why don't we just use `erlcloud` master? -> we added custom logic ages ago that I don't want to go back and have to unwind.

erlcloud master depends on `lhttpc` (started as an application), which is a non-starter with the way we're currently  using `lhttpc` in `boodah`. I had to swap it for `httpc`, and had to make various changes to fix individual modules we're currently using. There may be calls we're not using, however, that I may have missed.