KAFKA-2785; Include Kafka Connect jars in releaseTarGz.
KAFKA-2785; Include Kafka Connect jars in releaseTarGz.

Author: Ewen Cheslack-Postava <me@ewencp.org>

Reviewers: Jun Rao <3b8fe158618db0e3f4afb5782d706a350bebb0b8@gmail.com>

Closes #473 from ewencp/kafka-2785-include-copycat-jars-in-release

(cherry picked from commit 79bdc17ab4b0157ceb5257e6c4ff646a3fa55f6d)
Signed-off-by: Jun Rao <3b8fe158618db0e3f4afb5782d706a350bebb0b8@gmail.com>

racker/kafka,racker/kafka,racker/kafka,racker/kafka