Update database-api to follow OpenStack conventions

Update pom.xml for building the database-api document to follow the
conventions used by the OpenStack documentation team:
* Remove "review" from published guide
* Disable Disqus
* Use latest clouddocs-maven-plugin (2.0.2)
* Fix canonicalURL so that it points to the current location
* Fix formatting and whitespace of file

Remove hardcoded publication date from cdb-devguide, this gets
generated at build time.

Update doc-test.conf for pom.xml change.

Change-Id: I90eb16917edbb99d99147c4a8116f5bcf28e6975
Merge "Update database-api to follow OpenStack conventions"