CLM vector-format history files and restart files pfts1d_wt varnames

As far as I can tell, the PFT weight variables names with the same long_name attribute could be made more consistent in the CLM vector-format history files and the CLM restart files.

In the CLM restart files, the variable is pfts1d_wtxy
In the CLM vector files, the variable is pfts1d_wtgcell

ditto for pfts1d_wtlnd and pfts1d_wtlunit

double pfts1d_wtxy(pft) ;
pfts1d_wtxy:long_name = "pft weight relative to corresponding gridcell" ;
double pfts1d_wtlnd(pft) ;
pfts1d_wtlnd:long_name = "pft weight relative to corresponding landunit" ;
double pfts1d_wtcol(pft) ;
pfts1d_wtcol:long_name = "pft weight relative to corresponding column" ;

double pfts1d_wtgcell(pft) ;
pfts1d_wtgcell:long_name = "pft weight relative to corresponding gridcell" ;
double pfts1d_wtlunit(pft) ;
pfts1d_wtlunit:long_name = "pft weight relative to corresponding landunit" ;
double pfts1d_wtcol(pft) ;
pfts1d_wtcol:long_name = "pft weight relative to corresponding column" ;

Next time you get to code refactoring, please consider. It makes the accessor routines easier to support.