Refactor: Unit-tests server: Clients: remove describe blocks
Refactor: Unit-tests server: Cllients: replace should with expect
Refactor: Unit-tests server: Clients: de-couple business logic from req & res, to allow easier testing
Refactor: Unit-tests server: Routes: replace should with expect
Remove unused packages
Refactor: wrap routesTest in IIFE
Unit-tests server: Routes: add assert
Unit-tests server: Routes: use clients routes instead of projects
Unit-tests server: Clients: should edit an existing client
Unit-tests server: Clients: should delete an existing client
Unit-tests server: Clients: should get all clients
Refactor: rename variable