setup.py is always searching for CPLEX

[mattmilten]

Running python setup.py build yields:

>> python setup.py build
Traceback (most recent call last):
  File "setup.py", line 417, in <module>
    library_dirs=get_cplex_lib_dirs(),
  File "setup.py", line 399, in get_cplex_lib_dirs
    return [getlibdirs(cplexlibfolder), getlibdirs(concertlibfolder)]
  File "setup.py", line 395, in getlibdirs
    "Error could not find the lib folder in %s" % cplexhome)
RuntimeError: Error could not find the lib folder in /nfs/optimi

The same happens with python setup.py build -solver SCIP

related to https://stackoverflow.com/questions/40009141/install-scip-solver-on-python3-5-numberjack-osx/40013421#40013421