Comment 1 for bug 1742674

Based on comment above the linked code it is intentional to send the user id and project id of the _owner_ of the instance. Still I understand the need to know which user initiated the reboot action. Therefore I opened a blueprint to do this as a new addition to the versioned instance action notifications https://blueprints.launchpad.net/nova/+spec/add-action-initiator-to-instance-action-notifications