[dist] Mark cron job files as configuration files

This solves the rpmlint warning 'non-conffile-in-etc' caused by
having non-executable cron scripts in /etc/cron.d/.
Cron job files are supposed to be configurable by local system administrators.

dist/obs-server.spec

@@ -601,7 +601,7 @@ chown %{apache_user}:%{apache_group} /srv/www/obs/api/log/production.log
 # formerly obs-source_service
 /etc/init.d/obsservice
 %config(noreplace) /etc/logrotate.d/obs-source_service
-/etc/cron.d/cleanup_scm_cache
+%config(noreplace) /etc/cron.d/cleanup_scm_cache
 /usr/sbin/rcobsservice
 /usr/lib/obs/server/bs_service
 /usr/lib/obs/server/call-service-in-docker.sh
@@ -627,7 +627,7 @@ usermod -a -G docker obsservicerun
 /srv/www/obs/overview
 
 /srv/www/obs/api/config/thinking_sphinx.yml.example
-/etc/cron.d/obs_api_delayed_jobs_monitor
+%config(noreplace) /etc/cron.d/obs_api_delayed_jobs_monitor
 %config(noreplace) /srv/www/obs/api/config/thinking_sphinx.yml
 %attr(-,%{apache_user},%{apache_group}) %config(noreplace) /srv/www/obs/api/config/production.sphinx.conf