FIX: bugfixes

Comments:

gConfig.diracConfigFilePath does not work ( or it works, but not as expected ). It applies the same reasoning as on [ dirac-configure issue ](https://github.com/DIRACGrid/DIRAC/issues/1526). If we source the code from CVMFS, it picks the dirac.cfg from cvmfs ( even if we have one in /opt/dirac/etc/dirac.cfg and DIRACSYSCONFIG=/opt/dirac/etc/dirac.cfg )