Add Zeppelin

[ehoner]

Adds Zeppelin configured for use with Hopitmator. Includes new make targets: build-zeppelin and run-zeppelin.

Global changes

• Modifies Kubernetes config resolution.
  • Uses environment overrides to replace config values.
• Adds shadowJar to make install

Modification to upstream

• Sets default interpreter as Hoptimator.
• Removes all other non-jdbc connectors.
• Connects to local K8s services.

Local Zeppelin

steps:

# requires: make install build deploy-kafka deploy-samples
# build zeppelin artifacts
$ make build-zeppelin

# start local zepplin-server
$ make run-zeppelin

open browser: localhost:8080
create:

query:

[ryannedolan]

Looks great! I think we just need to add the Apache copyright header to a file or two.