Feature/ingest voices vcr config

@eshadatta It's harder to explain in comments so I made this pull request:

On looking further at this it seems like what we want is really to just configure VCR so we're only using it on a select few of requests. This can happen within the VCR config itself so I removed the `vcr_steps.rb` file and just used the config file instead.

Let's let this pass travis before we do anything