message: improve request refresh test case
  initial verification code impossible to be generated (length 1 v 10)
diff: @@ -224,7 +224,7 @@ describe('POST /api/email-card-drop-requests', function () {
  await emailCardDropRequestsQueries.insert({
  ownerAddress: stubUserAddress,
  emailHash,
  - verificationCode: 'xxxxxxyyyy',
  + verificationCode: 'x',
  id: '2850a954-525d-499a-a5c8-3c89192ad40e',
  requestedAt: new Date(insertionTimeInMs),
  });
  @@ -254,7 +254,7 @@ describe('POST /api/email-card-drop-requests', function () {
  let emailCardDropRequest = (await emailCardDropRequestsQueries.query({ ownerAddress: stubUserAddress }))[0];
  expect(emailCardDropRequest.verificationCode).to.match(verificationCodeRegex);
  - expect(emailCardDropRequest.verificationCode).to.not.equal('xxxxxxyyyy');
  + expect(emailCardDropRequest.verificationCode).to.not.equal('x');
  expect(emailCardDropRequest.emailHash).to.equal(emailHash2);
  expect(Number(emailCardDropRequest.requestedAt)).to.equal(fakeTime);
  