message: API: Add ensureOnlyOneAdmin to deleteUser unit test
diff: @@ -314,8 +314,14 @@ describe('User', () => {
  });
  describe(`DELETE ${BASE_URL}`, () => {
  + async function ensureOnlyOneAdmin() {
  + const admins = await FixtureUtils.getRandomAdmins(1, 2);
  + admins.length.should.be.eq(1);
  + return admins[0];
  + }
  +
  it('should fail to delete the only admin', async () => {
  - const admin = await FixtureUtils.getRandomAdmin();
  + const admin = await ensureOnlyOneAdmin();
  const res = await chai.request(app)
  .del(`${BASE_URL}/${admin._id}`)
  