Add names to serve test snapshots

rojo-test/serve-test-snapshots/serve_test__just_txt_all.snap

@@ -0,0 +1,19 @@
+---
+source: rojo-test/src/serve_test.rs
+expression: "read_response.intern_and_redact(&mut redactions, root_id)"
+---
+instances:
+  id-2:
+    Id: id-2
+    Parent: ~
+    Name: just_txt
+    ClassName: StringValue
+    Properties:
+      Value:
+        Type: String
+        Value: "Hello, world!"
+    Children: []
+    Metadata:
+      ignoreUnknownInstances: false
+messageCursor: 0
+sessionId: id-1