Actually use the default and enable travisci service

src/github.com/matrix-org/go-neb/goneb.go

@@ -26,6 +26,7 @@ import (
 	_ "github.com/matrix-org/go-neb/services/guggy"
 	_ "github.com/matrix-org/go-neb/services/jira"
 	_ "github.com/matrix-org/go-neb/services/rssbot"
+	_ "github.com/matrix-org/go-neb/services/travisci"
 	"github.com/matrix-org/go-neb/types"
 	_ "github.com/mattn/go-sqlite3"
 	"github.com/prometheus/client_golang/prometheus"

src/github.com/matrix-org/go-neb/services/travisci/travisci.go

@@ -152,6 +152,9 @@ func notifToTemplate(n webhookNotification) map[string]string {
 }
 
 func outputForTemplate(travisTmpl string, tmpl map[string]string) (out string) {
+	if travisTmpl == "" {
+		travisTmpl = DefaultTemplate
+	}
 	out = travisTmpl
 	for tmplVar, tmplValue := range tmpl {
 		out = strings.Replace(out, "%{"+tmplVar+"}", tmplValue, -1)