delete_mirror.sh should not delete the project with the same name in another group

[Adol1111]

I have two project with the same name, but in different group. When I run "delete_mirror.sh --delete xxxx", the project which in another group not Mirror group is deleted.

I see when you run delete_mirror.sh script, you only find project by project name without group name.

gitlab-mirrors/lib/manage_gitlab_project.py

Line 154 in 75483cd

deleted_project=find_project(name=project_name).delete()