Transport Fever 2 - Chinese Locomotive Connection Fix

Fixed a floating connection issue between chinese locomotives,including JF1,RM,DF4B,DF5,SS9G,HXD3B.

After adjustment, DF4B can be connected to passenger wagon correctly.

Note: This module also includes the power fix of HXD3B. It is not necessary to enable the previous power fix module. Enabling these two modules at the same time will cause conflicts and lead to power fix failure.

Authors: youngsheep