[JIRA] (OVIRT-1295) Add job to auto-rebase patches that are ready to be merged

Add job to auto-rebase patches that are ready to be merged ----------------------------------------------------------- Key: OVIRT-1295 URL: https://ovirt-jira.atlassian.net/browse/OVIRT-1295 Project: oVirt - virtualization made easy Issue Type: Improvement Reporter: eyal edri Assignee: infra Priority: Low We want to help stable branch maintainers to minimize the time needed for merging approved changes ( i.e CR +2 and VERIFY +1 ) and also to reduce the chance of merge conflicts. A suggestion was made to create a job which will detect patches ready to be merged with the flags CR +2 and V +1 set and will auto rebase them, so when a maintainer is ready to submit a patch, hopefully the patch won't need a rebase and can be merged without further waiting for rebase or CI. This approach might introduce challenges when working on patches that are dependent on other patches and a specific logic might be required to handle special cases. [~tnisan(a)redhat.com][~ykaul][~dfediuck] I hope this conveys the need and requirement, please comment or add thoughts if I missed anything. Initially we'll try enabling it for ovirt-engine on 4.1 branch.