Ticket #47298 - remove-ds-admin.pl does not stop the admin server
Bug description: Keyword to be replaced for the build had a
typo in the stopAdminServer subroutine.
Fix description: Replacing "@with_systemdsystemunitdir@" with
"@systemdsystemunitdir@".
https://fedorahosted.org/389/ticket/47298
Reviewed by Mark (Thank you!!)