Use the new versionlock specification from #169 on CentOS 8.
Also test the new specification on 7 and 8 also.
Finally test that if samba-devel is filtered at
an impossible version it is no longer available.
For the yum case probably assumes that samba-devel is not installed.
Pull Request (PR) description
Correct acceptence tests for DNF (8) system
Use the new versionlock specification from #169 on CentOS 8.
Also test the new specification on 7 and 8 also.
Finally test that if samba-devel is filtered at an impossible version it is no longer available. For the yum case probably assumes that samba-devel is not installed.