For these, it could be a nice use of ```functools.partial``` to do something like:
```python
get_support_file = partial(join, join(dirname(abspath(__file__)), 'support_files'))

DFLT_BASE_DATA_FOLDER = get_support_file('test_data')
SETTINGS_FP = get_support_file('qiita-db-settings.sql')
LAYOUT_FP = get_support_file('qiita-db.sql')
INITIALIZE_FP = get_support_file('initialize.sql')
POPULATE_FP = get_support_file('populate_test_db.sql')
```