package:nova-common:2:13.1.4-0ubuntu4.3
Setting up nova-common (2:13.1.4-0ubuntu4.3) ...
Adding system user `nova' (UID 130) ...
Adding new user `nova' (UID 130) with group `nova' ...
Not creating home directory `/var/lib/nova'.
usermod: no changes
Traceback (most recent call last):
  File "/usr/bin/nova-manage", line 6, in <module>
    from nova.cmd.manage import main
  File "/usr/lib/python2.7/dist-packages/nova/cmd/manage.py", line 64, in <module>
    from oslo_config import cfg
  File "/usr/lib/python2.7/dist-packages/oslo_config/cfg.py", line 365, in <module>
    from debtcollector import removals
  File "/usr/lib/python2.7/dist-packages/debtcollector/__init__.py", line 15, in <module>
    import pbr.version
ImportError: No module named pbr.version
dpkg: error processing package nova-common (--configure):
 subprocess installed post-installation script returned error exit status 1