ENH: update WRF and WPS to support version 4

[andreas-h]

Both WRF and WPS saw quite some changes in version 4.0. This commit
adapts the existing WPS and WRF easyblocks to accomodate them.

[houndci-bot]

Some files could not be reviewed due to errors:

Traceback (most recent call last):

Traceback (most recent call last):
  File "/home/linters/.local/bin/flake8", line 7, in 
    from flake8.main.cli import main
ModuleNotFoundError: No module named 'flake8'

[houndci-bot]

Some files could not be reviewed due to errors:

Traceback (most recent call last):

Traceback (most recent call last):
  File "/home/linters/.local/bin/flake8", line 7, in 
    from flake8.main.cli import main
ModuleNotFoundError: No module named 'flake8'

[boegel]

@akesandgren Are you OK with current status on this?

[akesandgren]

Still 2 things to change, chdir/remove_dir order and the comment about 2D tests

[andreas-h]

sorry, forgot to push. should include everything now.

[akesandgren]

LGTM

[akesandgren]

@boegel I'm ok with this. It's your change requests that are blocking.

[boegel]

Thanks a lot for the updates @andreas-h!