The value of tRPAdminPSAcptActionAigpMetric specifies the editing
action to be taken for the AIGP (Accumulated IGP) attribute when
the route satisfies the match criteria of the policy.
The value of tRPAdminPSAcptActionAigpMetric decides how to apply
tRPAdminPSAcptActnAigpMetricVal to the route. When the value of
tRPAdminPSAcptActionAigpMetric is set to 'none(1)' or 'useIgp(4)',
the value of tRPAdminPSAcptActnAigpMetricVal is ignored.