Upgrade from 171 to 202. Unpack and install directly from a cached tgz rather than going via the installer deb from webupd8. The installer is still on 8u919 while we want 202.

Testing via kafka branch builder job

https://jenkins.confluent.io/job/system-test-kafka-branch-builder/2305/

Author: Jarek Rudzinski <jarek@confluent.io>
Author: Ewen Cheslack-Postava <me@ewencp.org>

Reviewers: Alex Diachenko <sansanichfb@gmail.com>, Ewen Cheslack-Postava <ewen@confluent.io>

Closes #6165 from jarekr/trunk-jdk8-from-tgz