SEBA-705 Wrap all gRPC methods;
translate permission errors;
print prefix only when emitting final error message

Change-Id: I3cbb0cf8f321c965d11354cc01491f2b3c0dc1b3
diff --git a/commands/models_test.go b/commands/models_test.go
index 3a6031b..1f9abed 100644
--- a/commands/models_test.go
+++ b/commands/models_test.go
@@ -350,7 +350,7 @@
 }
 
 func TestModelDeleteNoExist(t *testing.T) {
-	expected := `[{"id":77, "message":"Slice matching query does not exist."}]`
+	expected := `[{"id":77, "message":"Not Found [on model Slice <id=77>]"}]`
 
 	got := new(bytes.Buffer)
 	OutputStream = got