Traceback (most recent call last):
  File "/usr/local/bin/marconi-server", line 6, in <module>
    from marconi.cmd.server import run
  File "/usr/local/lib/python2.7/dist-packages/marconi/__init__.py", line 28, in <module>
    import marconi.version
  File "/usr/local/lib/python2.7/dist-packages/marconi/version.py", line 16, in <module>
    import pbr.packaging
ImportError: No module named pbr.packaging