JIRA: https://jira.spring.io/browse/INT-4060
* Add `NLST` command to the `AbstractRemoteFileOutboundGateway` to perform
`listNames` on the target session.
Useful in case of server doesn't allow to perform `LS` or the names set is
sufficient for application requirements
* Add `workingDirExpression` to the `FtpOutboundGateway` to allow to perform
`FtpClient.changeWorkingDirectory()` based on the current request message
* Change `slf4j-log4j12` to the `testCompile` -
the FTP tests fail in the IDE with `ClassNotFoundException`
Address PR comments
* Add `nlst` to XSD config
* Reinstate `ls -1` test-case for the `FtpServerOutboundTests`
* wrap more commands to the `doInWorkingDirectory()`
Fix `MV` command in the `AbstractRemoteFileOutboundGateway`
* Implement `RemoteFileOperations#invoke(OperationsCallback<F, T>)`
for thread-bound `session`s
* Use a new `invoke()` for `put()` and `mPut()` commands in the `AbstractRemoteFileOutboundGateway`
* Add delegation for the `put()` and `mPut()` commands in the `FtpOutboundGateway`
* Add DSL support for the `workingDirExpression` and add `whats-new.adoc` note
Document changes
Address some PR comments:
* Add `invokeScope` variable to `execute` to track `ThreadLocal` session or not
* Check for `null` in the `getSession()` and fallback to regular
`sessionFactory.getSession()`.
Most likely the `invoke()` is called from other thread
Doc Polishing
3daeaab1b4