sapi init should properly scaffold tests

[etsuo]

describe('Password', () => {
  let sapi;
  beforeEach(() => {
    sapi = testSapi({
      providers: [
        PasswordService
      ]
    });
  });

  afterEach(() => {
    sapi.deregisterDependencies();
  });

  it(...) // whatever this is being done now
});