Add Label to Credentials in test files

Signed-off-by: Nassim 'Nass' Eddequiouaq <eddequiouaq.nassim@gmail.com>

secretservice/secretservice_linux_test.go

@@ -10,10 +10,10 @@ func TestSecretServiceHelper(t *testing.T) {
 	t.Skip("test requires gnome-keyring but travis CI doesn't have it")
 
 	creds := &credentials.Credentials{
+		Label:     credentials.CredsLabel,
 		ServerURL: "https://foobar.docker.io:2376/v1",
 		Username:  "foobar",
 		Secret:    "foobarbaz",
-		Label:     credentials.CredsLabel,
 	}
 
 	helper := Secretservice{}