This property ("The desired power state of the system when power is
restored after a power loss.") was added in ComputerSystem.v1_6_0 which
became part of 2018.3 Redfish release.
Example result from querying OpenBMC's bmcweb Redfish server:
```
entries:
- - system_uri: /redfish/v1/Systems/system
- AlwaysOff
ret: true
```
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
