test: get tests to work on SQLAlchemy 2

[jelly]

This has been sitting on my desktop for a while, totally forgetting the context but I assume our current tests issues are with SQLAlchemy 2.

[shibumi]

@jelly

=========================== short test summary info ============================
FAILED test/test_admin.py::test_delete_last_admin_fails - sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) UNIQUE constraint failed: user.name
[SQL: INSERT INTO user (name, email, salt, password, token, role, active, idp_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?)]
[parameters: ('cyberwehr12345678', '[email protected]', 'TxS`6_*7r6JE1;Gry+e!', '1@!!eWax}JP4o5jwcEh-8-C)VT&rHcaOZ0|51TL|DJ)2Bz))o6<(s^=LKO>YZx@&M9?1J}7rC-FT_dL@', None, 'administrator', 1, None)]
(Background on this error at: https://sqlalche.me/e/20/gkpj)
FAILED test/test_admin.py::test_edit_requires_admin - sqlalchemy.exc.IntegrityError: (sqlite3.IntegrityError) UNIQUE constraint failed: user.name
[SQL: INSERT INTO user (name, email, salt, password, token, role, active, idp_id) VALUES (?, ?, ?, ?, ?, ?, ?, ?)]
[parameters: ('cyberwehr87654321', '[email protected]', '>6{R+y^_;4ZGYTG6U8rR', '8K<cGa^d)R$6<L}+d!%FVn8+g!YS-EvxGm=;mpmP@&V|Pekt}OUF4DPf?@31d@@lin|I}tI4K}#n0awN', None, 'reporter', 1, None)]
(Background on this error at: https://sqlalche.me/e/20/gkpj)
ERROR test/test_admin.py::test_delete_user - sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) database is locked
[SQL: 
DROP TABLE advisory]
(Background on this error at: https://sqlalche.me/e/20/e3q8)
ERROR test/test_admin.py::test_deactive_user - sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) database is locked
[SQL: 
DROP TABLE advisory]
(Background on this error at: https://sqlalche.me/e/20/e3q8)
ERROR test/test_login.py::test_logout - sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) database is locked
[SQL: 
DROP TABLE advisory]
(Background on this error at: https://sqlalche.me/e/20/e3q8)
=========== 2 failed, 214 passed, 1300 warnings, 3 errors in 44.25s ============
make: *** [Makefile:52: test-py] Error 1

You might want to take another look ;)