This object contains the index value of the Zone or
Zone alias to which this member belongs.
If the value of the corresponding instance of
hpnicfFcZsZoneMemberParentType is 'zone', this object
will contain the value of the hpnicfFcZsZoneIndex object of
the Zone to which this member belongs.
If the value of the corresponding instance of
hpnicfFcZsZoneMemberParentType is 'alias', this object
will contain the value of the hpnicfFcZsAliasIndex object
of the Zone alias to which this member belongs.