Removed BHT and related code + specs
Merge pull request #182 from 18F/feature/remove_bht_clean_2

Removed BHT and related code + specs
Modifiying vagrant to make an easy dev env setup

Setting up answers should not require anything more than a `vagrant up`
or `foreman bootstrap`. These changes will add the required libs and
recipes to chef so the answers platform is running in the dev env
within the VM.
Move postgres user data to an encrypted databag