Purpose of this commit is to use the newly introduced helper to create
test users in a quick way and reduce code duplication.
This commit is linked to task ID 1889703 and PR #27526.
Several modules defines records with the external ID `base.foo_bar` while it is
created inside this module (typically menus and groups).
While there is no technical reasons to do so but this may introduce issues:
- these records will not be deleted during uninstall
- if a language is loaded before the installation of the module, it won't be
translated
The uninstallation will only remove the records with an external id linked to
this module (these would only be removed when removing base).
Installing a language before the module will drop the translations not linked
to an existing external id (as it can not be resolved).
This commit correct all the external ids tagged as from base or other incorrect
modules.
Thibault Delavallée