before this commit, code in files for Odoo core which are outside of
root_path/addons/
e.g. odoo/models.py, odoo/service/model.py
cannot be translated. Because the translation tool thinks they don't
belong to any module
after this commit, by reusing the same logic while exporting these code
translations,
they will be translated by using po files of the 'base' module
closesodoo/odoo#116602
X-original-commit: e29aca207e95725d4072fe2a6dfc928128c1e47b
Signed-off-by: Wang Chong (cwg) <cwg@odoo.com>