[JIRA] (OVIRT-1049) Rename EPEL mirrors to be Lago-compatible.

Rename EPEL mirrors to be Lago-compatible. ------------------------------------------ Key: OVIRT-1049 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1049 Project: oVirt - virtualization made easy Issue Type: Improvement Reporter: Barak Korren Assignee: infra Priority: High Lago requires that all repos have names that end with something like '-el6' or '-el7'. The EPEL mirrors however are currently simply called 'epel6' and 'epel7'. We have to rename the mirros or they won't get injected to OST runs.