Update branching system and repository policies

[branylagaffe]

QFlex repository is a mess of different active and stale branches. The QFlex repository need policies update toward branch naming, and who and how can branch be merged.

• [x] Get admin right on QFlex repository, and subsequent one
  • [x] (Optional) Get Organization admin right
• [x] Pick branching methodology
• [x] Pick policies
• [x] List to be deleted branches
• [x] Communicate changes
• [x] Update branching