message: outlier: add stdev factor to schema
diff: @@ -1189,6 +1189,11 @@ const std::string Json::Schema::CLUSTER_SCHEMA(R"EOF(
  "minimum" : 0,
  "exclusiveMinimum" : true
  },
  + "success_rate_stdev_factor" : {
  + "type" : "integer",
  + "minimum" : 0,
  + "exclusiveMinimum" : true
  + },
  "interval_ms" : {
  "type" : "integer",
  "minimum" : 0,
  