Remove unused global workdir from cloud-config tests
Remove unused global workdir from cloud-config tests

This was unintentionally copied from the cf-manifest tests in ca99b8b

alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf,alphagov/paas-cf