Mark tests that require internet connection

[xsuchy]

Recent release added new set of tests. Unfortunatelly this caused issue for me as Fedora package maintainer, because RPM packages are built in environment without internet access. Therefore test fails there.

It will be easier if test that requires internet connections will be marked such. I.e. like this one https://docs.pytest.org/en/latest/example/simple.html#control-skipping-of-tests-according-to-command-line-option

Right now, I disable this whole test/unit/test_vpc_v1.py :(

[xsuchy]

FTR here is log of failed build with all the tests failing due no internet connection https://kojipkgs.fedoraproject.org//work/tasks/1278/114481278/build.log (this log will stay there for 14 days)