#286: Fixed distributed writing to local filesystem

This fix enables local filesystem writes in a cluster setup.
Output directories for local FS writes are created on each TM but not on the JM (except if it hosts a TM as well).

The currently implemented override policy for local filesystem writes is:
- existing files is not deleted to create output directories (to avoid deleting OS files)
- existing files in existing output directories are overwritten

Let me know, if you want to enable deleting local FS files to create output directories.