'Get the details of a Security Group.
For a full list of available parameters, please refer to the official
API reference:
https://developer.openstack.org/api-ref/compute/#show-security-group-details'

def show_security_group(self, security_group_id):

    url = ('os-security-groups/%s' % security_group_id)
    (resp, body) = self.get(url)
    body = json.loads(body)
    self.validate_response(schema.get_security_group, resp, body)
    return rest_client.ResponseBody(resp, body)
