Not enough arguments error when getting openbmctool version with python 2.7

[thalerj]

When using python 2.7 with openbmctool and trying to get the tool version using the -V option, the command returns saying too few arguments.

python openbmctool.py -V usage: openbmctool.py [-h] [-H HOST] [-U USER] [-A | -P PW] [-j] [-t POLICYTABLELOC] [-V]

                  {fru,sensors,sel,chassis,collect_service_data,health_check,dump,bmc,mc,gardclear,firmware}
                  ...

openbmctool.py: error: too few arguments