Description of problem:
Before running tempest tests, while running tools/config_tempest.py to deploy configuration for tempest, I'm getting the following error:

12:27:25 stderr: Traceback (most recent call last):
12:27:25   File "tools/config_tempest.py", line 45, in <module>
12:27:25     from tempest_lib import auth
12:27:25 ImportError: No module named tempest_lib


Version-Release number of selected component (if applicable): latest


How reproducible:
100%

Steps to Reproduce:
1. install tempest from source
2. run tools/config_tempest.py 

Actual results:

12:27:25 stderr: Traceback (most recent call last):
12:27:25   File "tools/config_tempest.py", line 45, in <module>
12:27:25     from tempest_lib import auth
12:27:25 ImportError: No module named tempest_lib

Expected results:

No errors :)
configuration deployed.