Add internal WebService /api/organizations/delete

Delete the specified organization

• can be specified by UUID or functional key
• Requires to (be owner of the org) or have the "Administer System" global permission
• default organization can NOT be deleted and WS should return an error

This WebService must delete the organization and all its related data :

• permissions
• templates

Obviously, this WS will be updated as more domains are included in an organization.