Fix TestRelayOnlyConnection on debian

Debian based linux uses 127.0.1.1 as a local loopback address
in some condition of the install.

candidate_relay_test.go

@@ -46,7 +46,7 @@ func TestRelayOnlyConnection(t *testing.T) {
 		Urls: []*URL{
 			{
 				Scheme:   SchemeTypeTURN,
-				Host:     "localhost",
+				Host:     "127.0.0.1",
 				Username: "username",
 				Password: "password",
 				Port:     serverPort,

candidate_server_reflexive_test.go

@@ -42,7 +42,7 @@ func TestServerReflexiveOnlyConnection(t *testing.T) {
 		Urls: []*URL{
 			{
 				Scheme: SchemeTypeSTUN,
-				Host:   "localhost",
+				Host:   "127.0.0.1",
 				Port:   serverPort,
 			},
 		},