derive easyblock for iccifort only from icc easyblock (not ifort)

[bartoldeman]

EB_ifort is problematic since the module guesses include
$EBROOTICCIFORT/include which should not be added to CPATH
for a joint icc/ifort installation.

[boegel]

@bartoldeman There's a hard call to EB_ifort.sanity_check_step too, which is broken now:

ERROR: Traceback (most recent call last):
  File "/lib/python2.7/site-packages/easybuild_framework-4.1.1.dev0-py2.7.egg/easybuild/main.py", line 113, in build_and_install_software
    (ec_res['success'], app_log, err) = build_and_install_one(ec, init_env)
  File "/lib/python2.7/site-packages/easybuild_framework-4.1.1.dev0-py2.7.egg/easybuild/framework/easyblock.py", line 3092, in build_and_install_one
    result = app.run_all_steps(run_test_cases=run_test_cases)
  File "/lib/python2.7/site-packages/easybuild_framework-4.1.1.dev0-py2.7.egg/easybuild/framework/easyblock.py", line 3000, in run_all_steps
    self.run_step(step_name, step_methods)
  File "/lib/python2.7/site-packages/easybuild_framework-4.1.1.dev0-py2.7.egg/easybuild/framework/easyblock.py", line 2870, in run_step
    step_method(self)()
  File "/tmp/eb-s08Uo0/included-easyblocks/easybuild/easyblocks/iccifort.py", line 50, in sanity_check_step
    EB_ifort.sanity_check_step(self)
TypeError: unbound method sanity_check_step() must be called with EB_ifort instance as first argument (got EB_iccifort instance instead)

[bartoldeman]

Strange that that survived my testing.
Must be a difference between python2 and python3 I was not aware of yet. I'll have a look.

[bartoldeman]

It was indeed a difference between Python2 and 3:
https://portingguide.readthedocs.io/en/latest/core-obj-misc.html#unbound-methods

[boegel]

lgtm