Re-introduce python profile.d scripts

This reverts commits:
commit f380d4bc8fa60892a6ea3edf49a7d413c3153bcb
commit 495c7b919307e3c70e8dc1fc50a6a8c38189b195

    Don't need to make this directory

    /etc/profile.d scripts are not needed with environment modules

Without this profile script building of python roll failed because
the module opt-python is not loaded when the 'make roll' is run.

Moreover in rocks
/opt/python/bin/python
always worked just worked and not if you don't do module load
opt-python it doesn't work. Let's try to be backward compatible.