Cucumber-Puppet

• improve error logging in case of catalog compilation failure

Version 0.3.3 introduced error handling to the compilation step, so one could test for expected compilation failure. As this turned out to hinder debugging the regular case, where compilation failed unexpectedly, I restored the old behaviour of When I compile its catalog to throw an error and output an error message. To test for expected compilation failures, use the new step When I try to compile its catalog.