wazo-auth: Automatically add policies to all users of future tenants

As an administrator
I want to add a policy to all users, future users and users of future tenants automatically
In order to reduce the overhead of creating a new tenant

Technical proposition:

• add an option in config file:

•  

• at startup, wazo-auth checks whether those policies exist in every tenant

Tasks:

• wazo-auth startup

  • Create policies if they don’t exist

  • Associate policies to wazo-all-users group

  • Update policies if the ACL are different

  • See what happens if database is not available at startup

• Tenant creation

  • Create policies

  • Associate policies to wazo-all-users group