4bb46246df
Fixes: #9684
Issue link: https://github.com/spring-projects/spring-integration/issues/9684
The `RemoteFileTemplate` is missing to create a temporary remote directory
* Fix `RemoteFileTemplate.sendFileToRemoteDirectory()` to create a `temporaryRemoteDirectory`
as well if it is different from already created `remoteDirectory`
* Add `SftpServerOutboundTests.autoCreateTemporaryDirectory()` to verify that `temporaryRemoteDirectory` is created and in-use
* Some other `SftpServerOutboundTests` refactoring for better code style
(cherry picked from commit a4b193fa64)