The value of tRPOperPSAcptActionAigpMetric indicates the editing
action to be taken for the AIGP (Accumulated IGP) attribute when
the route satisfies the match criteria of the policy.
When the value of tRPOperPSAcptActionAigpMetric is set to 'none(1)'
or 'useIgp(4)', the value of tRPOperPSAcptActnAigpMetricVal is
ignored.