Renamed 'old' reference to the coord_system variable. coord_system had been...

Renamed 'old' reference to the coord_system variable. coord_system had been renamed to central_coord_system.

misc-scripts/assembly_patches/assembly_patch_load.pl

@@ -43,7 +43,7 @@ if (!defined $assembly_acc)  {
     throw("Please enter -assembly_acc eg. GCA_000001405.4");
 }
 
-if (!defined $coord_system)  {
+if (!defined $central_coord_system)  {
     throw("Please enter -coord_system to specify the central coord system eg. supercontig");
 }