CFY-924: multiple security groups bug while installing

	neutron_plugin.security_group.create() will use existing
	security group if it has the same name, description and
	rules as requested.
From NeutronClientException:
    def __init__(self, **kwargs):
        message = kwargs.get('message')
        self.status_code = kwargs.get('status_code', 0)
        if message:
            self.message = message
        super(NeutronClientException, self).__init__(**kwargs)
The check whether status_code attr is unnecessary, please remove it.