change to search for geojson files

Author: Alan Snow

tethysapp/streamflow_prediction_tool/controllers.py

@@ -379,7 +379,7 @@ def get_watershed_layers_info(a_watershed_list):
                     available_forecast_dates = \
                         available_forecast_dates + \
                         get_ecmwf_valid_forecast_folder_list(
-                            path_to_watershed_files, ".txt")
+                            path_to_watershed_files, ".geojson")
 
     # set up the inputs
     watershed_select = SelectInput(display_text='Select Watershed',