Locked hoppers transporting items into hoppers below them

Locked hoppers will transport items into hoppers below them.

Steps to reproduce:

1. Create a hopper with another hopper under it
2. Lock the top hopper
3. Place an item in the top hopper
   Results:
   Items will be transported into the hopper below
   Expected Results:
   Items will stay in top hopper. If the hopper is facing into a chest and the hopper is locked, it will not transport items.