This object indicates if the DMM node corresponding to this
conceptual row is 'primary'.
A node in a cluster is considered 'primary' if:
a) the cluster services are preferred to be implemented on
the node
b) if the node acts as a management interface to the cluster.
Otherwise, the node is considered 'secondary'.
The value 'true(1)', indicates that the VP is primary.
The value 'false(2)', indicates that the VP is secondary.