clean up scripts and update to new OS versions

mentioned in merge request !8 (merged)

By Mart van Santen on 2020-02-20T08:54:30 (imported from GitLab)

created merge request !8 (merged) to address this issue

By Mart van Santen on 2020-02-20T08:54:30 (imported from GitLab)

closed via merge request !8 (merged)

By Arie Peterson on 2020-03-25T09:11:33 (imported from GitLab)

mentioned in commit 4c4b397e

By Arie Peterson on 2020-03-25T09:11:34 (imported from GitLab)