Dump a forum of a project

Tables that are dumped:
- news_bytes
- forum_group_list
- forum
- forum_agg_msg_count
- forum_thread_id

Not dumped:
- forum_monitored_forums
- forum_monitored_thread
- forum_saved_place

Change-Id: I4973f479614ae22193690e14407de3dc337f167a
Merge commit 'refs/changes/84/484/3' of http://gerrit.tuleap.net/tuleap into stable

* http://gerrit.tuleap.net/tuleap:
  Dump a forum of a project
This is Tuleap 6.1.99.17