add API of network, attribute updates.
add API of network, attribute updates.

nis-sdn/odenos,haizawa/odenos,haizawa/odenos,nis-sdn/odenos,o3project/odenos,nis-sdn/odenos,o3project/odenos,haizawa/odenos,haizawa/odenos,nis-sdn/odenos,o3project/odenos,o3project/odenos,nis-sdn/odenos,o3project/odenos,haizawa/odenos