Handling LoadError
Handling LoadError

This change handles file loading errors in cases of running tests
against deleted/misspelt spec file locations.
Otherwise the spec proceeds to run injecting runID in @output_hash
variable which isn't initialized yet, and gives a NameError
```console
NameError: uninitialized constant JsonOutputFormatter::RunIdentifier
```

ndlib/QA_tests,ndlib/QA_tests,ndlib/QA_tests