str: web system group (defaults to
        :attr:`web_user <tmdeploy.config.AnsibleHostVariableSection.web_user>`)

def web_group(self):
        '''str: web system group (defaults to
        :attr:`web_user <tmdeploy.config.AnsibleHostVariableSection.web_user>`)
        '''
        if self._web_group is None:
            self._web_group = self.web_user
        return self._web_group