* Increase a `default-delay="1000"` for `GatewayInterfaceTests` to test the late reply scenario * Use a `ConcurrentHashMap` for `JdbcMessageStore.queryCache` to avoid a possible `ConcurrentModificationException`
* Increase a `default-delay="1000"` for `GatewayInterfaceTests` to test the late reply scenario * Use a `ConcurrentHashMap` for `JdbcMessageStore.queryCache` to avoid a possible `ConcurrentModificationException`