Make eddy tests runnable in non-SGE environments

Adjusts the eddy tests so they can be run in regular non-cluster environments. Adjustments to evaluation scrips to avoid nibabel deprecation warnings.

Also an unrelated fix to one of the bet unit tests.

requested review from @jesper

added 1 commit

• 424a281b - MNT: Use get_fdata instead of deprecated get_data

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merged