Description
When trying to update a site in Site Factory an error is displayed about missing column 's' in relation "ezsite"

Steps to reproduce
1. Install eZ Platform 3.0 on DB PostgreSQL
2. Enable Site Factory
3. Create a test site in Site Factory
4. Try to edit created site in Site factory

Actual:

An error message display: 
An exception occurred while executing 'UPDATE ezsite s SET s.name = ? WHERE s.id = ?' with params ["test", 2]: SQLSTATE[42703]: Undefined column: 7 ERROR: column "s" of relation "ezsite" does not exist LINE 1: UPDATE ezsite s SET s.name = $1 WHERE s.id = $2 ^

Expected:

A site will be updated without errors