Name things slightly better

Signed-off-by: Miek Gieben <miek@miek.nl>

plugin/traffic/lb.go → plugin/traffic/grpc_lb.go

 package traffic
 
-import "github.com/miekg/dns"
+import (
+	"github.com/miekg/dns"
+)
 
 // See https://github.com/grpc/grpc/blob/master/doc/service_config.md for the fields in this proto.
 // We encode it as json and return it in a TXT field.
-var lbTXTxds = `grpc_config=[{"serviceConfig":{"loadBalancingConfig":[{"xds_experimental":{"lrs_load_reporting_server_name":""}}]}}]`
-
-// Current impl. that will be removed in favor of xds
-var lbTXTgrpc = `grpc_config=[{"serviceConfig":{"loadBalancingConfig":[{"grpclb":{}}]}}]`
+var lbTXT = `grpc_config=[{"serviceConfig":{"loadBalancingConfig":[{"eds_experimental":{"LrsLoadReportingServerName":"","Cluster": "xds"}}]}}]`
 
 func txt(z string) []dns.RR {
 	return []dns.RR{&dns.TXT{
 		Hdr: dns.RR_Header{Name: z, Rrtype: dns.TypeTXT, Class: dns.ClassINET, Ttl: 5},
-		Txt: []string{lbTXTgrpc},
+		Txt: []string{lbTXT},
 	}}
 }

plugin/traffic/setup_test.go

@@ -15,7 +15,7 @@ func TestSetup(t *testing.T) {
 }
 
 func TestLBTxt(t *testing.T) {
-	for _, txt := range []string{lbTXTxds, lbTXTgrpc} {
+	for _, txt := range []string{lbTXT} {
 		if _, err := json.Marshal(txt); err != nil {
 			t.Errorf("Failed to marshal grpc serverConfig: %s", err)
 		}