HPCC-8579 Running hpcc-init setup on dafilesrv takes a long time

The chown's that are performed on every startup are unnecessary and can be
painfully slow at times, resulting in problems starting thors (especially
after a drive swap).

These chowns were also masking a bug where the ownership of the config
files generated by configgen at system startup were not correct - they would
get corrected the second time the system was started.

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>