Allow to disable crontabs

tasks/main.yml

@@ -178,6 +178,7 @@
       minute='{{ svnserver_cron_sync.minute|default(omit) }}'
       job='rsync -av --delete --log-file=/tmp/svnsync.log {{svnserver_master}}:/var/svn/ /var/svn >/dev/null 2>&1'
       user='sshsvn'
+      disabled='{{ crons_disabled|default(false) }}'
     when: svnserver_slave and svnserver_cron_sync.active
     tags: 'cron'