Refactor / clean, and report deprecated practices

[alexAubin]

Meh, I was just implementing new features and just noticed too many weird or buggy things so I'm ending up with this :|.

• I refactored and clean various parts to improve structure and readability
• There were many tests not behaving properly due to the use of shlex ... some of them I still don't understand. Fixed it by checking a raw reading. Maybe that brings false-negative, but at least there should be way less false-positive. We can improve later with regex and stuff like this, or get a better understanding of shlex.
• Added check for use of deprecated practices :
  • yunohost app setting
  • yunohost app checkurl
  • yunohost app checkport
  • yunohost app initdb
  • exit
  • separate php-fpm.ini
  • dd if=/dev/urandom or openssl rand for random string generation
• And other check for scary stuff :
  • systemctl restart nginx
  • yunohost service add without a corresponding yunohost service remove

[alexAubin]

Bumpity bump .. I'd like to get feedback on this though not sure who to ask to :s

[alexAubin]

Yolo then :P

@YunoHost/apps / @yunohost-apps : If you did not get the info before : I expect this new version to trigger a number of previously uncaught warnings and errors for many apps (which might cause apps to be downgraded to level 3, 4 or 5). In case you find bugs or weird stuff, please let me know and we can iterate.