BUG #13694: Row Level Security by-passed with CREATEUSER permission

The following bug has been logged on the website:

Bug reference:      13694
Logged by:          Justin Catterson
Email address:      justin.catterson@sofiebio.com
PostgreSQL version: 9.5beta1
Operating system:   Ubuntu 14.10 x64
Description:

Users with the CREATEUSER permission do not evaluate Row Level Security
functions.  pg_user usebypassrls is set to false.

To repeat:
  CREATE POLICY ... WITH CHECK ((Select myFunction()))
  CREATE USER my_user;
  ALTER USER my_user WITH CREATEUSER;

Have myFunction() return a result of False;
   Update a record belonging to policy.

   Record will successfully update, when it should fail.

ALTER USER my_user WITH NOCREATEUSER;
   Update a record belonging to policy.
   Record will fail as expected.