Mapping to cgra update reduce

[bobcheng15]

1. Update compute_node.py to add the required new configurations to configure the PE sitting inside the reduce_pe_cluster
2. Update reduce_node.py to add the required new configurations to configure the Reduce sitting inside the reduce_pe_cluster
3. Update all nodes that connects to/from reduce node to update the connection port name required by the change of port name in the updated reduce_pe_cluster