Adding additional info and error handling when attempting to discover a heroku app. This helps resolve an issue where the app may be mispelled or otherwise incorrect in .travis.yml and will now provide a more useful error than 403 Forbidden
removed begin block
Updated check app spec to match improved messages
Adding user instance variable
Revert "Adding user instance variable"

This reverts commit 36d120a710f8429fcfdfac3715f6e5a5c2b9b4f9.
Not calling user in message