private void awaitUpdate() throws TimeoutException, InterruptedException {
      TestUtils.awaitLatchOrTimeout(latch, LATCH_TIMEOUT_MS);
    }
Wait for at least one account update since the last {@link #reset()}.
@throws TimeoutException
@throws InterruptedException
ambry-tools/src/integration-test/java/com/github/ambry/account/AccountUpdateToolTest.java