Take the full return data and format it to simple output

def _format_ret(self, full_ret):
        '''
        Take the full return data and format it to simple output
        '''
        ret = {}
        out = ''
        retcode = 0
        for key, data in six.iteritems(full_ret):
            ret[key] = data['ret']
            if 'out' in data:
                out = data['out']
            ret_retcode = self._get_retcode(data)
            if ret_retcode > retcode:
                retcode = ret_retcode
        return ret, out, retcode