Returns the status of any current operation to set the next
backup boot configuration file. The following values may be
returned:
1 (idle) There is no backup boot configuration
setting operation in progress.
2 (success) The last backup boot configuration
setting operation completed
successfully.
3 (failure) The last backup boot configuration
setting operation failed.
5 (syncing) A backup boot configuration setting
operation is currently in progress and
the file is being syncronised across
the stack or system.
When a read of this object returns a value of 'success' or
'failure', it will immediately be reset to 'idle' and a new
operation may be initiated if desired. A detailed description
of the last completed operation may be determined by reading
backupCnfgLastSetResult.