[JIRA] (OVIRT-1393) Make mirror injection process remove “skip_if_unavailable” settings

Make mirror injection process remove “skip_if_unavailable” settings ------------------------------------------------------------------- Key: OVIRT-1393 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1393 Project: oVirt - virtualization made easy Issue Type: New Feature Components: Jenkins Reporter: Barak Korren Assignee: infra Labels: containers, mirrors, mock_runner.sh This is a part of [containers CI/CD|https://docs.google.com/a/redhat.com/document/d/1mEo3E0kRvlUWT9VaSP...] flow implementation process. In order to allow having stub repository configuration files as specified in OVIRT-1391, we need to be able to use the "{skip_if_unavailable}" yum setting. But we don't want this setting to still be in affect once mirror injection happens and the repo configuration points to a real repo. Therefore we need to make the mirror injection process remove this setting for repo configurations into which mirror URLs are injected.