Fix for Fedora latest

[JCGoran]

One of the init scripts in the latest version of LMOD doesn't handle -e mode properly, so as a fix we temporarily turn it off when using it.

[JCGoran]

Seems that now we have a (new!) build failure on MacOS with NEURON 8.2.6. The traceback is:

Traceback (most recent call last):
  File "/Users/runner/work/nrn-build-ci/nrn-build-ci/nrn/setup.py", line 659, in <module>
    mac_osx_setenv()
  File "/Users/runner/work/nrn-build-ci/nrn-build-ci/nrn/setup.py", line 628, in mac_osx_setenv
    if py_osx_framework is not None and explicit_target > py_osx_framework:
                                        ^^^^^^^^^^^^^^^
UnboundLocalError: cannot access local variable 'explicit_target' where it is not associated with a value