add support to exclude any part from backup

defaults/main.yml

 gitlab:
   backup:
     enable: True
-    disable_repositories: False
+    disable_part: []
     keep_days: 9
     external_url: 'https://localhost'
     path: '/var/opt/gitlab/backups'

tasks/backups.yml

 - name: add gitlab-rake backup cronjob
   cron:
     name: gitlab-rake backup
-    job: "/opt/gitlab/bin/gitlab-rake gitlab:backup:create CRON=1{% if gitlab.backup.disable_repositories %} SKIP=repositories{%endif%}"
+    job: "/opt/gitlab/bin/gitlab-rake gitlab:backup:create CRON=1{% if gitlab.backup.disable_part %} SKIP={{ gitlab.backup.disable_part|join(',') }}{%endif%}"
     special_time: daily
 - name: add gitlab-tar backup cronjob
   cron:

tasks/gitlab.yml

@@ -2,7 +2,6 @@
   apt:
     pkg: gitlab-ce
 
-
 - name: copy gitlab.rb
   template: src=gitlab.rb.j2 dest=/etc/gitlab/gitlab.rb mode=0600 owner=root group=root
   notify:
@@ -12,7 +11,7 @@
   cron:
     name: gitlab registry cleanup
     job: '/opt/gitlab/bin/gitlab-ctl registry-garbage-collect -m 2>/dev/null >/dev/null'
-    special_time: weekly
+    special_time: daily
 
 - name: install python modules needed for group sync
   apt: