Add ability to Write Data from Hive Table/Query to Kafka Topic

This patch adds multiple record writers to allow Hive user writing data directly to a Kafka Topic.
The end goal is have a writer that provides multiple write semantics modes.

• • A BEST_EFFORT where all the records will be delivered with no guarantee or reties eg best effort mode. (Done)-
• B At_least_once, each record will be delivered with retries from the Kafka Producer and Hive Write Task. (Done)
• C Exactly_once , Writer will be using Kafka Transaction API to ensure that each record is delivered once. (not so, still need more discussions)

In addition to the new feature i have refactored the existing code to make it more readable.