Reduce tests boilerplate code

[AzisK]

Goal
Reduce tests boilerplate code

Description
Reduce tests boilerplate code by using the post method in https://github.com/pets-oss/pets-back/blob/main/test/utils/requests.ts

Example of such usage

pets-back/test/animal.graphql.test.ts

Lines 51 to 66 in a6e54b2

	it('Returns animal id=1 with all fields', (done) => {
	const req = requests(`{ animal(id: 1)
	${animalFields}
	}`);
	req.expect(200)
	.end((err, res) => {
	if (err) {
	// eslint-disable-next-line no-console
	console.log(res.body);
	return done(err);
	}
	validate(res.body.data.animal);
	return done();
	});
	});

Bonus
It would be great to abstract and hide the error logging code from the main test logic

if (err) { 
    // eslint-disable-next-line no-console 
    console.log(res.body); 
    return done(err); 
}