test_pip fails in an offline VM

[jayvdb]

When building venvctrl in a rpmbuild offline VM, test_pip fails because it requires ability to install confpy via pip, which by default requires PyPI access.

This could be solved by installing a small dummy wheel which is kept in the source repo, or create-able from the source repo.

The second half of test_pip installs the packages found in https://github.com/kevinconway/venvctrl/blob/master/requirements.txt , which is currently empty. This seems like a no-op atm.

Another approach is to enable system-packages in the virtualenv , so that pip can find these packages are already installed.