Remove old P and V semaphore function and moved tests

src/utility/objaddr.rs

@@ -62,6 +62,7 @@ impl ObjAddr {
         self.semaphores.remove(&id)
     }
 
+    /// Remove the object of id **id** from self if it exists
     pub fn remove_lock(&mut self, id:i32) -> Option<Lock> {
         self.locks.remove(&id)
     }