JIRA: https://jira.spring.io/browse/INT-4021
Previously the `SimpleMessageStore` unconditionally followed with the super class options
and provided the `lazy-load` functionality by default.
* Since `persistent` and `lazy-load` logic does not make sense for the `in-memory` store, disable it in the `SimpleMessageStore`
* Fir `AggregatorTests` for better coverage.
* NOTE: The same message can't be persisted in the Persistent `MessageStore`. The store key is fully based on the `messageId`.
And also we provide the header which indicates that the messages has been stored before. See `JdbcMessageStore.addMessage()` for example:
```
if (message.getHeaders().containsKey(SAVED_KEY)) {
Message<T> saved = (Message<T>) getMessage(message.getHeaders().getId());
if (saved != null) {
if (saved.equals(message)) {
return message;
} // We need to save it under its own id
}
}
```
* Fix (S)FTP Streaming tests to use `AbstractPersistentAcceptOnceFileListFilter` instead of raw `AcceptOnceFileListFilter`,
which relies on the object identity, but neither `FtpFile`, nor `ChannelSftp.LsEntry` provides good `equals()` and `hashCode()` implementations.
* Make `StompIntegrationTests` as `DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD` because the sporadic failure on the Travis around wrong value from the queue isn't clear (yet).
Looks like some interim event is generated by the Websocket Container on the Tomcat.
6c774638cc