Cypress tests require data created by mocha tests, but should be self-contained

[kriswest]

Describe the bug
The cypress tests for the repo page depend on data that is created and abandoned by the mocha tests. I.e. the test-repo used here:

git-proxy/cypress/e2e/repo.cy.js

Lines 11 to 21 in 3718943

	const cloneURL = 'http://localhost:8000/finos/test-repo.git';
	const tooltipQuery = 'div[role="tooltip"]';
	cy
	// tooltip isn't open to start with
	.get(tooltipQuery)
	.should('not.exist');
	cy
	// find the entry for finos/test-repo
	.get('a[href="/admin/repo/test-repo"]')

The data is created in a mocha test here:

git-proxy/test/addRepoTest.test.js

Lines 44 to 49 in 3718943

	const res = await chai.request(app).post('/api/v1/repo').set('Cookie', `${cookie}`).send({
	project: 'finos',
	name: 'test-repo',
	url: 'https://github.com/finos/test-repo.git',
	});
	res.should.have.status(200);

Which also has to handle it (perhaps) already existing on run:

git-proxy/test/addRepoTest.test.js

Lines 26 to 29 in 3718943

	// Prepare the data.
	await db.deleteRepo('test-repo');
	await db.deleteUser('u1');
	await db.deleteUser('u2');

Ideally tests should handle their own set-up and tear-down (clean-up). As the cypress tests use client-side JS they can't directly import the DB clients and create the data they need, but they could make API calls or a node script be used for setup and tear down before/after the cypress command.

Expected behaviour
Each set of tests handles its own data creation and subsequent clean-up.

Additional context
Add any other context about the problem here.