Fix espilit validation test

tests/validation/config.json

@@ -14,7 +14,8 @@
       "referenceImage": "WCafe.png"
     },
     {
-      "title": "Espilit",
+      "title": "Espilit",      
+      "renderCount": 10,
       "sceneFolder": "/Scenes/Espilit/",
       "sceneFilename": "Espilit.binary.babylon",
       "referenceImage": "Espilit.png"
@@ -174,6 +175,7 @@
     },
      {
       "title": "PBR glossy",
+      "renderCount": 10,
       "scriptToRun": "/Demos/PBRGlossy/index.js",
       "functionToCall": "CreatePBRGlossyScene",
       "referenceImage": "pbrglossy.png"