[HUDI-2330][HUDI-2335] Adding support for merge-on-read tables (#3679)

- Inserts go into logs, hashed by Kafka and Hudi partitions
 - Fixed issues with the setupKafka script
 - Bumped up the default commit interval to 300 seconds
 - Minor renaming

hudi-kafka-connect/demo/config-sink.json

@@ -9,10 +9,11 @@
 		"value.converter.schemas.enable": "false",
 		"topics": "hudi-test-topic",
 		"hoodie.table.name": "hudi-test-topic",
+		"hoodie.table.type": "MERGE_ON_READ",
 		"hoodie.base.path": "file:///tmp/hoodie/hudi-test-topic",
 		"hoodie.datasource.write.recordkey.field": "volume",
 		"hoodie.datasource.write.partitionpath.field": "date",
 		"hoodie.schemaprovider.class": "org.apache.hudi.schema.SchemaRegistryProvider",
 		"hoodie.deltastreamer.schemaprovider.registry.url": "http://localhost:8081/subjects/hudi-test-topic/versions/latest"
-    }
+	}
 }