The postgresql_user module has several drawbacks:
* No granularity for privileges
* PostgreSQL semantics force working on one
database at time, at least for Tables. Which
means that a single call can't remove all the
privileges for a user, and a user can't be
removed until all the privileges are removed,
forcing a module failure with no way to
work around the issue.
Changes:
* Added the ability to specify granular privileges
for database and tables within the database
* Report if user was removed, and add an option to
disable failing if user is not removed.