verify that output_dir is directory in output_dir() fixture
verify that output_dir is directory in output_dir() fixture

vlukes/sfepy,rc/sfepy,sfepy/sfepy,BubuLK/sfepy,sfepy/sfepy,vlukes/sfepy,BubuLK/sfepy,vlukes/sfepy,rc/sfepy,BubuLK/sfepy,rc/sfepy,sfepy/sfepy