tree ea33e3307d0ba6e32a0c6723b33b64ec6c809533
parent 5e1543f7537a4f95070909a43e9a2ef3e6f843e0
author lianghao <lianghao@cmss.chinamobile.com> 1488788476 +0800
committer Liang Hao <lianghao@cmss.chinamobile.com> 1488962895 +0000

Add a  negative test for security_group api

Currently,test_security_groups_negative.py only prevent to create
a security_group named "default",but sometimes,
user create a security_group named "test-123",
and then change the name to "default",
so we should add negative test as below.

Change-Id: Ie34b854267fefe56eef1f40a1446e73676100bf3