Refactor/Remake test_student_logged_in test.

[GabrielSimonetto]

As the docstring describes, this test needed to be removed for complications with the hardcoded manner in which it tests the functionality. I think magic mocks can solve this pretty well, but it someone has a better idea feel free to comment upon it

@network_needed
@requires_auth
@pytest.mark.skip(reason="Still needs work")
def test_student_logged_in():
    """This test used to work on the second semester of 2019.
    
    Then, the student progressed to other classes and the test began to fail.
    
    Solving this test will require a mock, or an adaptation of the student() function
        in order to fix the target semester of interest (if that is even possible) """

    cagr = CAGR()
    cagr.login(**CREDENTIALS)

    student = cagr.student("16100719")

    assert student.name == "Cauê Baasch de Souza"
    assert student.program == "CIÊNCIAS DA COMPUTAÇÃO"
    assert student.classes == [
        StudentClass(
            name="Redes de Computadores I",
            subject_id="INE5414",
            class_id="04208",
        ),
        StudentClass(
            name="Construção de Compiladores",
            subject_id="INE5426",
            class_id="06208",
        ),
        StudentClass(
            name="Planejamento e Gestão de Projetos",
            subject_id="INE5427",
            class_id="06208",
        ),
        StudentClass(
            name="Introdução ao Trabalho de Conclusão de Curso",
            subject_id="INE5453",
            class_id="06208",
        ),
        StudentClass(
            name="Bancos de Dados III",
            subject_id="INE5600",
            class_id="06238",
        ),
        StudentClass(
            name="Introdução à Internacionalização e Localização de Software",
            subject_id="INE5653",
            class_id="07238",
        )
    ]