On linux the net-tools suite of utilities has been long since deprecated. The relevant code that gets executed on Fedora and EPEL should be identified and patched out, with a suitable pull request upstream, to remove the dependency on any tool in the net-tools package and instead use suitable tools form iproute2.
Patched: https://pagure.io/testcloud/pull-request/50
testcloud-0.1.14-1.fc27 has been submitted as an update to Fedora 27. https://bodhi.fedoraproject.org/updates/FEDORA-2017-ccd823d206
testcloud-0.1.14-1.fc26 has been submitted as an update to Fedora 26. https://bodhi.fedoraproject.org/updates/FEDORA-2017-b88096697f
testcloud-0.1.14-1.fc25 has been submitted as an update to Fedora 25. https://bodhi.fedoraproject.org/updates/FEDORA-2017-ef27434eb4
testcloud-0.1.15-1.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-ef27434eb4
testcloud-0.1.15-1.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-b88096697f
testcloud-0.1.15-1.fc27 has been pushed to the Fedora 27 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-ccd823d206
testcloud-0.1.15-1.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.
testcloud-0.1.15-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
testcloud-0.1.15-1.fc27 has been pushed to the Fedora 27 stable repository. If problems still persist, please make note of it in this bug report.