Pass specs file name to gribdata.fieldData (#248)

Allows users to specify which UPP fields are used when making various
plots by creating their own default_specs.yml that can be passed to
pygraf using the --specs option.

adb_graphics/figure_builders.py

@@ -117,6 +117,7 @@ def parallel_maps(cla, fhr, ds, level, model, spec, variable, workdir,
             member=mem,
             model=model,
             short_name=variable,
+            config=cla.specs['file']
             )
 
         try:
@@ -135,6 +136,7 @@ def parallel_maps(cla, fhr, ds, level, model, spec, variable, workdir,
                 member=mem,
                 model=model,
                 short_name=variable,
+                config=cla.specs['file']
                 )
 
             try:

adb_graphics/utils.py

@@ -287,6 +287,8 @@ def load_specs(arg):
     with open(spec_file, 'r') as fn:
         specs = yaml.load(fn, Loader=yaml.Loader)
 
+    specs['file'] = spec_file
+
     return specs
 
 def old_enough(age, file_path):