[JIRA] (OVIRT-2423) Update build_reposync_config

Update build_reposync_config ------------------------------ Key: OVIRT-2423 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-2423 Project: oVirt - virtualization made easy Issue Type: Task Reporter: Galit Rosenthal Assignee: infra Change the build_reposync_config.sh to get only a reposync file and provide an updated reposync file. Should provide an answer to all suites who uses this file