Reflects the operational state of an lookupCtlEntry:
enabled(1) - Operation is active.
notStarted(2) - Operation has not been enabled.
completed(3) - Operation has been completed.
An operation is automatically enabled(1) when its
lookupCtlRowStatus object is transitioned to active(1)
status. Until this occurs, lookupCtlOperStatus MUST
report a value of notStarted(2). After the lookup
operation is completed (success or failure), the value
for lookupCtlOperStatus MUST be transitioned to
completed(3).