copr-frontend: install custom crontabs for error supressing

there are some problems with cronjobs that should be fixed upstream.
Given that copr admins are not the ones receiving the error emails,
it's the best to just supress them.

roles/copr/frontend-cloud/files/cron.daily/copr-frontend

@@ -0,0 +1,3 @@
+#!/usr/bin/sh
+
+runuser -c '/usr/share/copr/coprs_frontend/manage.py vacuum_graphs' - copr-fe

roles/copr/frontend-cloud/tasks/main.yml

@@ -8,8 +8,11 @@
   command: "restorecon -vvRF /var/lib/pgsql"
   when: pgsql_ls.stdout is defined and 'postgresql_db_t' not in  pgsql_ls.stdout
 
-- name: install custom copr-frontend-crontab to make update_graphs silent
-  copy: src=copr-frontend dest=/etc/cron.daily/
+- name: install daily custom copr-frontend-crontab
+  copy: src=cron.daily/copr-frontend dest=/etc/cron.daily/
+
+- name: install hourly custom copr-frontend-crontab
+  copy: src=cron.hourly/copr-frontend dest=/etc/cron.hourly/
 
 - name: install copr-frontend and copr-selinux
   dnf: state=latest name={{ item }}