* Edited NO_TEST_DATA_MESSAGE to refer to --test_data, not --test-data

[pvanheus]

0.3.0 (2015-02-13) changed --test-data to --test_data, but the NO_TEST_DATA_MESSAGE was referring to --test-data.

The code still looks for a default directory called test-data though. Perhaps this should be changed to test_data or it should look for both test-data and test_data?

[jmchilton]

Thanks for the fix, Galaxy and the tool shed call the directory test-data but all the planemo command-line parameters use _. I think this is okay since one thing is a command line and one is a file and those can have differing conventions, though if I could do it over I might have gone with - for Planemo's command-line parameters.