Fix flaky TestReadOnly.testConnectionStateNewClient in ZooKeeper 3.9.3

[kezhuw]

ZOOKEEPER-4508 reports SessionExpired after exhausting session timeout
in session establishment instead of endless retries. It is easy to get
in this now with small session timeout.

Besides above, sessionTimeoutMs should bigger than connectionTimeoutMs,
while default Timing::session() and Timing::connection() are 2s and
10s respectively now.

// from CuratorZookeeperClient

if (sessionTimeoutMs < connectionTimeoutMs) {
    log.warn(
            "session timeout [{}] is less than connection timeout [{}]", sessionTimeoutMs, connectionTimeoutMs);
}

[kezhuw]

See also #1252 (review).