Move yaml/json sample configs into the samples dir like the other ones

tests/samples/bar.yaml

@@ -0,0 +1,7 @@
+---
+# Top comment
+foo: "bar"
+
+blah:
+  - something
+  - else

tests/samples/foo.json

@@ -0,0 +1,11 @@
+{
+  "foo": "bar",
+  "nested": {
+     "a": 1,
+     "b": true
+   },
+   "list": [
+      10,
+      20
+   ]
+}