Open Stack

Hi All,

This is follow up on [1].
Running the full tempest test-suite in parallel without the 
allow_tenant_isolation=True settings, can cause random not too obvious
failures, which caused lot of issue to tempest newcomers. 

There are special uses case when you might want to disable it,
for example when you would like to run just for several test cases for
benchmarking, when you know it is safe for sure, and you do not want to
include account creation related times to the result.

Now, the other case when you might want to disable this feature, when
you running tempest without admin account. This is expected to change
with the upcoming `test accounts` [2], where allow_tenant_isolation=True
is expected to be the recommended configuration. 
 
Best Regards,
Attila

[1] https://review.openstack.org/#/c/157052/
[2] https://blueprints.launchpad.net/tempest/+spec/test-accounts