Temporary export files should be stored in the node-local temp directory

The exporters use the "temp" folder within the home directory as returned by Confluence's SAL implementation of ApplicationProperties. In a datacenter installation this returns the shared home directory and not the node-local home directory.

Confluence uses a scheduled job to clean up temporary directories, however this job only clears the node-local temp directory.

Therefore the temporary files created during exports are never removed out of the box.

The exporters should use the node-local temp directories to ensure such files get removed eventually.