Issue on hanasaki reservoir restarting

[nmizukami]

Currently a restart run with hanasaki reservoir model on does not reproduce the results from the simulation without restarting. This is because restart run resets H06_E_rel_ini to the values provided in the network file in restart run, while running from earlier time, H06_E_rel_ini is modified here this line.

To fix this, H06_E_rel_ini value needs to be written in restart time and read it from restart file and assign it to H06_E_rel_ini when restarting.

This issue affect both cesm-coupling and stand-alone.