Preparing Apache Zeppelin release 0.9.0-preview2

Preparing Apache Zeppelin release 0.9.0-preview2

[hotfix] fix Dockerfile for 0.9.0-preview1

Preparing Apache Zeppelin release 0.9.0-preview1

[ZEPPELIN-4365] Docker image for 0.8.2 not available on docker hub

Tag for 0.8.2 release

Preparing Apache Zeppelin release 0.8.2

Tag for 0.8.1 docker

Tag release 0.8.1

Preparing Apache Zeppelin release 0.8.1