This script can now check and abandon old patches only from
specified project.
Project must be one of Neutron deliverables.
Project can be passed to script with parameter:
"--project <project_name>"
If no project is specified it will get old patches from all projects
which are part of neutron stadium.
Change-Id: I83b9a556d551db9f78b3d628df8648309e1dda1d