Remove subdirectories of $purged_dirs

[deligatedgeek]

Hi @djjudas21

FreeRadius installation (Mine is 3.2.5) now adds directory realms as a subdirectory of certs, which the current file resource purge cannot delete, causing these messages and restarting FreeRadius on every puppet run.

Notice: /Stage[main]/Freeradius/File[/etc/freeradius/3.0/certs/realms]: Not removing directory; use 'force' to override
Notice: /Stage[main]/Freeradius/File[/etc/freeradius/3.0/certs/realms]/ensure: removed (corrective)
Debug: /Stage[main]/Freeradius/File[/etc/freeradius/3.0/certs/realms]: The container freeradius certs will propagate my refresh event

I have set force to purge the subdirectory and stop this problem.

This can also be fixed with a resource collector hack in the puppet profile, but this is cleaner