fix failed run exit code when clean_dokken_sandbox is false

[Stromweld]

Description

If clean_dokken_sandbox provisioner option is set to false, kitchen converge always exits with exit code 0 even if the chef-client run fails convergence. This is due to the return negating the exception that was raised.

Issues Resolved

#318

Type of Change

bug fix

Check List

• [ ] New functionality includes tests
• [x] All tests pass
• [ ] Commit message includes a Conventional Commit Message