modify a sunburst mock to include rotation option

Author: archmoj

test/image/baselines/treemap_sunburst_basic.png

@@ -194,6 +194,7 @@
         },
         {
             "type": "sunburst",
+            "rotation": 180,
             "level": "",
             "labels": [
                 "A1",
@@ -295,6 +296,7 @@
         },
         {
             "type": "sunburst",
+            "rotation": 90,
             "level": "",
             "labels": [
                 "C1",