Test again.
test again and again
[Chenghong/Zhanfei] Add manager and can store into locker.
store bag into robot when locker is full
should store into smart robot when locker and robot are both full
should store bag into super robot when locker and robot and smart robot are all full
clean code
can get bag when manager store bag into locker
can pick when bag is stored into robot
can pick if bag is stored into smart robot or super robot