bug:replace with func recordFailure

[zgfzgf]

tag.Insert
func (m *Map) insert(k Key, v string, md metadatas) {
if _, ok := m.m[k]; ok {
return
}
m.m[k] = tagContent{value: v, m: md}
}
should be：
func (m *Map) upsert(k Key, v string, md metadatas) {
m.m[k] = tagContent{value: v, m: md}
}

lotus/chain/sub/incoming.go

Lines 605 to 611 in dc3d17c

	func recordFailure(ctx context.Context, metric *stats.Int64Measure, failureType string) {
	ctx, _ = tag.New(
	ctx,
	tag.Upsert(metrics.FailureType, failureType),
	)
	stats.Record(ctx, metric.M(1))
	}