tree a7c63be6a7039ef222862e9c249a5c8ed7a63ce7
parent 87adf8d84f6b97df50e793a5566b2e1a2477dad8
author zhufl <zhu.fanglei@zte.com.cn> 1511427097 +0800
committer zhufl <zhu.fanglei@zte.com.cn> 1511427097 +0800

Change Conflict's error message

Conflict exception's error message is sometimes misleading,
e.g.,

<class 'tempest.lib.exceptions.Conflict'>,
An object with that identifier already exists
Details: {u'message':
            u'Unable to complete operation on subnet
              98575cac-0a2f-4214-8dea-50c62d31e736:
            One or more ports have an IP allocation from this subnet.',
            u'type': u'SubnetInUse', u'detail': u''}

according to https://tools.ietf.org/html/rfc7231#section-6.5.8,
"The 409 (Conflict) status code indicates that the request could not
be completed due to a conflict with the current state of the target
resource", so this is to change the error message to
"Conflict with state of target resource".

Change-Id: Icc118ec67f05cc7640e2b5f12162547ae5c3dae5