The following error terminated my stack.sh run. I used DevStack stable/liberty, all-in-one Ubuntu 14.04.3 (Trusty) VM behind a proxy with self-signed certificate (purposeful MITM). Thanks in advance for any tips to fix this.

Traceback (most recent call last):

File "/usr/local/bin/keystone-manage", line 6, in <module>
    from keystone.cmd.manage import main

File "/opt/stack/keystone/keystone/cmd/manage.py", line 32, in <module>
    from keystone.cmd import cli

File "/opt/stack/keystone/keystone/cmd/cli.py", line 28, in <module> 
  from keystone.common import config

File "/opt/stack/keystone/keystone/common/config.py", line 248, in <module>
    help='role-assignment inheritance to projects from '

File "/usr/local/lib/python2.7/dist-packages/oslo_config/cfg.py", line 1043, in __init__
    super(BoolOpt, self).__init__(name, type=types.Boolean(), **kwargs)

TypeError: __init__() got an unexpected keyword argument 'deprecated_reason'
...
Error on exit
+ generate-subunit 1455310909 213 fail