Labs 2, 3 and 4 - DevStack Liberty Release removed

I was suprised to find your labs did not work and you were depending on the public repo for your offering. We have a fair contingent of admins who are looking to take this course. I would like to support your efforts but lack of labs will force us to look elsewhere to train our staff.

i have done a bit of digging and found no clear resolution for this error:

2017-03-23 14:07:17.091 | + generate-subunit 1490278007 30 fail

2017-03-23 14:07:17.152 | Traceback (most recent call last):

2017-03-23 14:07:17.152 |   File "/usr/local/bin/generate-subunit", line 7, in <module>

2017-03-23 14:07:17.152 |     from os_testr.generate_subunit import main

2017-03-23 14:07:17.152 |   File "/usr/local/lib/python2.7/dist-packages/os_testr/__init__.py", line 15, in <module>

2017-03-23 14:07:17.152 |     import pbr.version

2017-03-23 14:07:17.152 |   File "/usr/local/lib/python2.7/dist-packages/pbr/version.py", line 25, in <module>

2017-03-23 14:07:17.152 |     import pkg_resources

2017-03-23 14:07:17.152 |   File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 72, in <module>

2017-03-23 14:07:17.152 |     import packaging.requirements

2017-03-23 14:07:17.152 | ImportError: No module named requirements

please advise.