Change NBalanceCheck abort writes to more similar to others

The inputs for NBalanceCheck writes out a list of variables, and that should be changed to have
headers like in CBalanceCheck:

``` fortran
write(iulog,*)'--- Inputs ---'

write(iulog,*)'--- Outputs ---'
```

And changed to have a single variable per line, rather than a list. Also supplemental Nitrogen should
always be output because it will be zeroed if not on. ndep should also be written only if ndep is being used.

The if's for FATES columns in ctsm5.1.dev131 can hence be removed.