changed header name to comply with dataporten

jwt.go

@@ -96,7 +96,7 @@ func (jwm *JWTMiddleware) getJWTToken(
 	claims.SetIssuedAt(now)
 	claims.SetAudience(aud)
 	claims.Set("principals", principals)
-	claims.Set("acr_values", r.Header.Get("X-Dataporten-Acr-Values"))
+	claims.Set("acr_values", r.Header.Get("X-Dataporten-Acr"))
 	claims.Set("userid-sec", r.Header.Get("X-Dataporten-Userid-Sec"))
 	claims.SetIssuer(conf.GetStringValue("engine.issuer_url"))
 	claims.SetExpiration(now.Add(time.Duration(lifeTime) * time.Second))