Fix error on tests

[meomancer]

Error
ImportError: Failed to import test module: django_project.cloud_native_gis.admin
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/unittest/loader.py", line 415, in _find_test_path
    package = self._get_module_from_name(name)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/unittest/loader.py", line 325, in _get_module_from_name
    __import__(name)
  File "/tmp/pycharm_project_27/django_project/cloud_native_gis/admin/__init__.py", line 4, in <module>
    from .general import *
  File "/tmp/pycharm_project_27/django_project/cloud_native_gis/admin/general.py", line 17, in <module>
    admin.site.register(License, LicenseAdmin)
  File "/usr/local/lib/python3.12/site-packages/django/contrib/admin/sites.py", line 132, in register
    raise AlreadyRegistered(msg)
django.contrib.admin.sites.AlreadyRegistered: The model License is already registered with 'cloud_native_gis.LicenseAdmin'.

Error
ImportError: Failed to import test module: django_project.cloud_native_gis.models
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/unittest/loader.py", line 415, in _find_test_path
    package = self._get_module_from_name(name)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/unittest/loader.py", line 325, in _get_module_from_name
    __import__(name)
  File "/tmp/pycharm_project_27/django_project/cloud_native_gis/models/__init__.py", line 3, in <module>
    from .general import *
  File "/tmp/pycharm_project_27/django_project/cloud_native_gis/models/general.py", line 44, in <module>
    class License(AbstractTerm):
  File "/usr/local/lib/python3.12/site-packages/django/db/models/base.py", line 134, in __new__
    raise RuntimeError(
RuntimeError: Model class django_project.cloud_native_gis.models.general.License doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS.

django.db.utils.OperationalError: database "test_django" is being accessed by other users
DETAIL:  There is 1 other session using the database.