Error message if fmu path not existant

[EttoreZ]

This issue is to check that fmupath in testcase.py TestCase __Init__ method exists or else an exception is thrown. The proposed modification is to add a try: execpt: with the os.path.exists() method.

[dhblum]

Sounds great. Want to make a PR to https://github.com/ibpsa/project1-boptest/tree/issue475_fmuPath?

[EttoreZ]

Thank you for creating the branch @dhblum . I will make a PR on that branch tomorrow morning

[EttoreZ]

@dhblum I updated the pull request. Also to leave trace here for our conversation today. In a future version the error trigger should be moved directly to the bash script to be more precise in the error identification.

[dhblum]

Closed by #478.