Ensure Testtrack is resilient to links that no longer exist #45
Description
I got an error that Testtrack was trying to open a schema file that no longer exists.
open /Users/mainguyen/src/mobile-ios/testtrack/schema.yml: no such file or directory
I had cloned a repo, and then set up testtrack in that directory. I ended up deleting the directory, and when I tried accessing local for a different directory, I kept running into testtrack errors (specifically this one: https://github.com/Betterment/test_track_rails_client/blob/master/app/models/test_track/visitor.rb#L163)
After stopping testtrack-cli on brew, and then running the testtrack server manually, the error message above surfaced.
We should ensure that testtrack cleans up the symlinks to files once the files have been removed.