General Information: PrimaryStatus provides a high level status
value, intended to align with Red-Yellow-Green type representation of status.
It should be used in conjunction with DetailedStatus to provide high level and
detailed health status of the ManagedElement and its subcomponents.
PrimaryStatus consists of one of the following values: Unknown, OK,
Degraded or Error. "Unknown" indicates the implementation is in general
capable of returning this property, but is unable to do so at this time.
"OK" indicates the ManagedElement is functioning normally. "Degraded"
indicates the ManagedElement is functioning below normal. "Error"
indicates the ManagedElement is in an Error