JIRA: https://jira.spring.io/browse/INT-4154 * Move `Transformers` for files to the `Files` factory * Remove `@Deprecated` methods * Fix `FilesTests` for new packages and removed methods like `.handleWithAdapter()` Provide JavaDocs for File DSL and implement some new methods like `chmod()` and `renameFunction()` Fix race condition in the `ScriptsTests` when even small time window delay may lead us to one more message in the queue