Setting tag tests-6.0-5

tests module updated when moving to fedora29 and python3
most notably, the check-initscripts and cross-check-tcp steps no longer are default steps, which is arguable
also a new step django-install is introduced to smoothen installation
knows about new myplc-core package
forget about yum, use dnf as a first class citizen
forget about service, use systemctl instead
explicitly enable sfa services - through systemctl again of course
drop the omf-friendly business altogether