In the #26402 we started to pass the attribute instead of ignoring it.
But now if someone had an old hammer command working, with invalid type of the `scsi_controller_type`, the command will fail on new version.

For not breaking old hammer commands, which dropped the attribute altogether, I would like to drop invalid values for this attribute.

Better solution would be validate and give the user meaningful feedback, but it is out of scope and would not reach the same version as the fix.