Simplify setup.sh

- Auto password by default
- No questions ask about subdomain deletion
- Only ask once for company name
- No need of IP address anymore
- Can disable restart of apache (for appliance)
- On centos, by default, use existing SSL certificates

Change-Id: Ie262c58a46815597545604bc47c0150c8ab28ff7
Merge commit 'refs/changes/69/669/1' of http://gerrit.tuleap.net/tuleap into HEAD

* http://gerrit.tuleap.net/tuleap:
  Simplify setup.sh

Change-Id: I06e972240d5bdf67b05f6a6b694146f11c982540
This is Tuleap 6.2.99.37

Change-Id: I9a2a8c5c70434ff3351dd7e8e0608a07d7a7d292