Testing

[alexAubin]

• Allow bonjour protocol
• Do not integrate ynh-vpnclient-checker in yunohost
• Clean unecessary / overly complex code

[alexAubin]

Added a test job here : https://ci-apps-dev.yunohost.org/jenkins/job/vpnclient_ynh%20(aleks)/

I intend to yolomerge if tests are passing because I need this PR to move forward with the new install process :s