The script does still verify that the variable reference to the data directory is set. Thus, the root
directory could only be removed as a result of malicious intent. A user could intentionally not
set the data directory and remove the verification check or the user could intentionally set the
data directory to the root location.
Former-commit-id: efe867dc134027eb7cdf393473476fcc4ec0f6f8
amend: vacuum databases after upgrade due to: http://www.postgresql.org/docs/9.3/static/release-9-3-2.html E.4.2 VACUUM tests
amend: update viz xdat to use the newer PostgreSQL jdbc driver
amend: fix formatting
Change-Id: Icda3348eea3e5edd879acb3a897bc530e73fb7f3
Former-commit-id: 426a8c8863ea6be7d6795ace387c214ce3b36790
