allow to execute scenario  without logging in odoo.
It can be used to execute sql to repair a database or to create the database before logging in.
For this add a tag @no_login to you scenario
refactor get of admin_login_password
Merge pull request #3 from yvaucher/fix-create-db-odoo-8

Add support of `no_login' tag that will allow to run a scenario without having to have erppeek to login.
It will also fix the creation of database with latest version of erppeek