tree 0b9915f172bc4b201361331f73f7f1699c9693e3
parent d4e19753962b84cbd6ba172eb11f2a7b659e240c
author ivan-zhu <bozhu@linux.vnet.ibm.com> 1364457305 +0800
committer ivan-zhu <bozhu@linux.vnet.ibm.com> 1364457785 +0800

refine _get_isolated_creds

when exceptions.Duplicate is thrown in _get_isolated_creds, it
should be handled as the following:
1. reuse the existing tenant or user if it's allowed.
2. regenerate tenant name or user name, and try to create it again
until it's successful, shouldn't just raise the exception.

Change-Id: I69c4026aa4c32d4822342da0ac3f7243c0db6fd4