Fixes: #8967
In the `fair` mode the `StandardRotationPolicy` re-configures an `AbstractFetchLimitingMessageSource`
for a new directory (and possible new `ConnectionFactory`) in the `beforeReceive()`.
However, with default `maxFetchSize` (or bigger than `1`), the `receive()`` would poll `toBeReceived` internal queue
for files cached from the previous polling cycle.
Since we rotate the source immediately to a new set of options, all those cached files don't make sense
or even can cause the problem on fetching their content in case of `AbstractRemoteFileStreamingMessageSource`
when we rotate to a new `ConnectionFactory`.
* Call `fetchLimitingMessageSource.setMaxFetchSize(1);` in the `StandardRotationPolicy.beforeReceive()`
when `fair && !this.initialized`
(cherry picked from commit c78630e6a9)
2d048474c0