use different hostname for testdata

useful information. use echo command to display messages instead

are super fragmented. Maybe the finders should be reworked to deal with
this

allows finding of qwt

added qwt path to ci script

modified some entries in gitlab-ci.yml for testing

Updated submodules

See merge request !284

Hotfix osx missing plugins

See merge request !283

moved remaining branding logic in cmake file to the top so branding wont break by hotfix for missing plugins

set the path for Qt to qt 5.8 for our lab machines

See merge request !282

enabled multiprocesscompilation on CI builds

See merge request !281

set process number to 4