This object indicates previous OpStatus value.
It will be updated after new OpCommand is set and delivered
to upgrade process.
'none' - no operation was performed.
'invalidOperation' - the selected operation is not
supported.
'failure' - the selected operation has failed.
'inProgress' - specified operation is active.
'success' - specified operation has completed
successfully.
'abortInProgress' - abort in progress.
'abortSuccess' - abort operation successful.
'abortFailed' - abort failed.
'successReset' - specified operation has completed
successfully and the system will
reset.
'fsUpgReset' - fabric switch upgrade reset.