* fix failing unit tests
* fix unit test pipeline
* add newline to unit-test file
* preserve semantics from docker volume test
* add error-handling tests
* reorganize file structure of unit tests
* add comment for using _file format in ensure relay credentials test
* add error handling unit tests
* use unit-test directory
* stack trace should be from the unit test directory
* Slightly better fail signal
* Clearer start as well
Co-authored-by: Chad Whitacre <chadwhitacre@sentry.io>