Update the whole copyright to 2018

Hello,

we need to update the copyright to 2018

A+

created branch 5883-update-the-whole-copyright-to-2018

By bmortier on 2018-08-31T14:14:34 (imported from GitLab)

mentioned in merge request !384

By bmortier on 2018-08-31T14:14:36 (imported from GitLab)

closed via merge request !384

By bmortier on 2018-09-02T14:44:42 (imported from GitLab)

mentioned in commit c9acf5fb

By bmortier on 2018-09-02T14:44:42 (imported from GitLab)

added Changed label

By bmortier on 2018-09-07T10:56:55 (imported from GitLab)

added 1h of time spent at 2018-09-07

By bmortier on 2018-09-07T10:57:09 (imported from GitLab)