Fix ordering of DS matchlists to match the Perl

traffic_ops/traffic_ops_golang/deliveryservice/deliveryservicesv13.go

@@ -752,6 +752,7 @@ JOIN deliveryservice_regex as dsr ON dsr.regex = r.id
 JOIN deliveryservice as ds on ds.id = dsr.deliveryservice
 JOIN type as t ON r.type = t.id
 WHERE ds.xml_id = ANY($1)
+ORDER BY dsr.set_number
 `
 	rows, err := tx.Query(q, pq.Array(dses))
 	if err != nil {

traffic_ops/traffic_ops_golang/deliveryservice/deliveryservicesv13_test.go

@@ -25,8 +25,31 @@ import (
 
 	"github.com/apache/trafficcontrol/lib/go-tc"
 	"github.com/apache/trafficcontrol/lib/go-util"
+
+	"github.com/jmoiron/sqlx"
+	"gopkg.in/DATA-DOG/go-sqlmock.v1"
 )
 
+func TestGetDeliveryServicesMatchLists(t *testing.T) {
+	// test to make sure that the DS matchlists query orders by set_number
+	mockDB, mock, err := sqlmock.New()
+	if err != nil {
+		t.Fatalf("an error '%s' was not expected when opening a stub database connection", err)
+	}
+	defer mockDB.Close()
+
+	db := sqlx.NewDb(mockDB, "sqlmock")
+	defer db.Close()
+
+	mock.ExpectBegin()
+	mock.ExpectQuery("SELECT .+ ORDER BY dsr.set_number")
+
+	GetDeliveryServicesMatchLists([]string{"foo"}, db.MustBegin().Tx)
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Errorf("expectations were not met: %s", err)
+	}
+}
+
 func TestMakeExampleURLs(t *testing.T) {
 	expected := []string{
 		`http://routing-name.ds-name.domain-name.invalid`,