[openFATE 310298] Support Clone and supersed of request easily

Feature changed by: Adrian Schröter (adrianSuSE) Feature #310298, revision 2 Title: Support Clone and supersed of request easily - Buildservice: Candidate + Buildservice: Done Priority Requester: Important Projectmanager: Important Requested by: Adrian Schröter (adriansuse) Developer: (Novell) Description: Support cloning a request (means creating a new project with branches of packages from submiting projects). "osc sr" will offer to supersed former request on creating new one. -- openSUSE Feature: https://features.opensuse.org/310298