Fixed pyspark_to_elasticsearch.py in ch05 to work, using the dataframe API loading the parquet files.
Fixed pyspark_to_elasticsearch.py in ch05 to work, using the dataframe API loading the parquet files.

rjurney/Agile_Data_Code_2,naoyak/Agile_Data_Code_2,naoyak/Agile_Data_Code_2,rjurney/Agile_Data_Code_2,naoyak/Agile_Data_Code_2,rjurney/Agile_Data_Code_2,rjurney/Agile_Data_Code_2,naoyak/Agile_Data_Code_2