HPCC-11397 Add message for stopping dafilesrv

Display message for dafilesrv  when run "hpcc-init stop"
Display message if dafilesrv already started when run "hpcc-init start"
Add check dafilesrv for "hpcc-init restart"
Merge pull request #5893 from xwang2713/HPCC-11397_stop_dafilesrv

Hpcc 11397 stop dafilesrv

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>