Name the arguments in the function call and other fixes
    
    - Close the DB session at the end of the function
    - Log to the terminal the project for which we're running the hooks
    (this way it will show up in the error email when a merge PR task fails)
    - Ensure there is a project, should never be triggered though
    
    Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>