MXS-1271: Remove redundant JSON parsing

As the cdc.py script outputs newline delimited JSON, there's no need to
parse the JSON in the cdc_kafka_producer.py script.

server/modules/protocol/examples/cdc_kafka_producer.py

@@ -16,7 +16,6 @@
 #     pip install kafka-python
 #
 
-import json
 import sys
 import argparse
 from kafka import KafkaProducer
@@ -30,8 +29,6 @@ parser.add_argument("-T", "--kafka-topic", dest="kafka_topic",
                     default=None, required=True)
 
 opts = parser.parse_args(sys.argv[1:])
-decoder = json.JSONDecoder()
-rbuf = bytes()
 producer = KafkaProducer(bootstrap_servers=[opts.kafka_broker])
 
 while True:
@@ -41,18 +38,9 @@ while True:
       if len(buf) == 0:
          break
 
-      rbuf += buf.encode()
-
-      while True:
-         rbuf = rbuf.lstrip()
-         data = decoder.raw_decode(rbuf.decode('ascii'))
-         rbuf = rbuf[data[1]:]
-         producer.send(topic=opts.kafka_topic, value=json.dumps(data[0]).encode())
-         producer.flush()
-
-   # JSONDecoder will return a ValueError if a partial JSON object is read
-   except ValueError as err:
-      pass
+      data = buf.encode().strip()
+      producer.send(topic=opts.kafka_topic, value=data)
+      producer.flush()
 
    # All other errors should interrupt the processing
    except Exception as ex: