Fix issue with Cask test

I'm not sure why this started failing all of a sudden, but the solution is to
mock out "brew cask 2" for "bake brew cask 2&>/dev/null". Go figure.
Use new homebrew curl location

missing: brew
Whoops, the Homebrew installer has moved! Please instead run:

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

Also, please ask wherever you got this link from to update it to the above.
Thanks!
verifying : brew
*  failed
homebrew location should match given location