Update csv2catchmentnetcdf.py issue NOAA-OWP#710

Address issue NOAA-OWP#710. 

In line 79, when parsing the date column, using the dictionary, as was done before this edit, pandas attempts to parse the column at index 0, to a column 'Time'. So, if 'Time' is already a column the error in issue NOAA-OWP#710  is produced.

The proposed change assumes column at  index  0 is the date column, but works despite the name.

utilities/data_conversion/csv2catchmentnetcdf.py

@@ -71,7 +71,7 @@ def process_sublist(data : dict, lock: Lock, num: int):
         #load the csv data
         print("Process ", num, " reading file", csv_file)
 
-        df = pd.read_csv(join(input_path,csv_file), parse_dates={"Time": [0]}, na_values=["   nan"])
+        df = pd.read_csv(join(input_path,csv_file), parse_dates=[0], na_values=["   nan"])
 
         if first:
             ds = create_partial_netcdf(netcdf_path + "." + str(num), num_inputs, df.columns)
@@ -181,4 +181,4 @@ def main():
 
 
 if __name__ == "__main__":
-    main()
+    main()