Hudi Demo for Json DFS Source

  #Apply patch to add DFS properties
https://github.com/bvaradar/hudi/commit/a4f79a7ab6955503e3cca0a36876305a544991ee

Instead of Step (1) in demo

varadarb-C02SH0P1G8WL:hudi varadarb$ docker exec -it adhoc-2 /bin/bash

# Creating DFS Root Directory
root@adhoc-2:/opt#hadoop fs -mkdir -p /var/data/input_batch/

## Copy batch_1 to DFS
root@adhoc-2:/opt# hadoop fs -copyFromLocal /var/hoodie/ws/docker/demo/data/batch_1.json /var/data/input_batch/.

## FOr delta-streamer invocations, change --source-class and --props
spark-submit --class com.uber.hoodie.utilities.deltastreamer.HoodieDeltaStreamer $HUDI_UTILITIES_BUNDLE --storage-type COPY_ON_WRITE --source-class com.uber.hoodie.utilities.sources.JsonDFSSource --source-ordering-field ts  --target-base-path /user/hive/warehouse/stock_ticks_cow --target-table stock_ticks_cow --props /var/demo/config/dfs-source.properties --schemaprovider-class com.uber.hoodie.utilities.schema.FilebasedSchemaProvider

# Do similar changes instead of Step 5 http://hudi.incubator.apache.org/docker_demo.html#step-5-upload-second-batch-to-kafka-and-run-deltastreamer-to-ingest

## Copy batch_2 to DFS
root@adhoc-2:/opt# hadoop fs -copyFromLocal /var/hoodie/ws/docker/demo/data/batch_2.json /var/data/input_batch/.

## Similar changes to delta-streamer invocations