Remove SSL verification from MySQL

In this commit, the SSL verification is removed from the database connection. This is because this verification lead to unnecessary warnings in the server logs.

changed the description

By Max van Deursen on 2018-05-25T10:23:59 (imported from GitLab project)

merged

By Max Pigmans on 2018-05-25T11:17:19 (imported from GitLab project)

mentioned in commit 731d5ca8

By Max Pigmans on 2018-05-25T11:17:19 (imported from GitLab project)