Comment 2 for bug 1552622

guess this is a rare case due to race condition

2016-03-03 18:19:40.679 INFO nova.osapi_compute.wsgi.server [req-c49d4de4-4dba-44d4-9d8f-b945c806af28 admin admin] 192.168.132.1 "PUT /v2.1/42e2752b7b24407fa051cae30400d5d1/os-quota-sets/861450f94f6c4e22a44faf440e6977c8 HTTP/1.1" status: 200 len: 596 time: 0.1933990

2016-03-03 18:19:40.838 INFO nova.osapi_compute.wsgi.server [req-f13d93c2-f917-4f18-a380-79c194414934 admin admin] 192.168.132.1 "DELETE /v2.1/42e2752b7b24407fa051cae30400d5d1/os-quota-sets/861450f94f6c4e22a44faf440e6977c8 HTTP/1.1" status: 202 len: 272 time: 0.1546450

the original PUT method want to create the limit and it found limit was created then retry with update method
however, delete action was executed during above 2 actions and nova didn't handle it well

set to low because it's a very rare case ..