Catch exits in spec_helper and raise an exception that can be handled in other specs

[viktorerlingsson]

WHAT is this pull request doing?

Defines exit in spec_helper so we can catch any program exits and instead raise an exception that we can handle in other specs.

HOW can this pull request be tested?

Run specs.

[spuun]

exit should be exit(status = 0) and the exception should accept the status and expose it in a property. Then one can rescue it and check the status.

[viktorerlingsson]

exit should be exit(status = 0) and the exception should accept the status and expose it in a property. Then one can rescue it and check the status.

Yes, agreed 👍