'Writes a list of failed_suites to sys.stderr'

def report_test_results(self):

    if (len(self.failed_suites) > 0):
        msg = colorize('red', '\n\n{bar}\nTests    failed    in    the    following    suites:\n*    '.format(bar=('=' * 48)))
        msg += colorize('red', ('\n*    '.join([s.root for s in self.failed_suites]) + '\n\n'))
    else:
        msg = colorize('green', '\n\n{bar}\nNo    test    failures    '.format(bar=('=' * 48)))
    print msg
