fix prompty tests

Author: Neehar Duvvuri

sdk/evaluation/azure-ai-evaluation/tests/e2etests/test_prompty_async.py

@@ -104,12 +104,8 @@ async def test_first_match_image(self, prompty_config: Dict[str, Any]):
         result = await prompty(image="image1.jpg", question="What is this a picture of?")
         assert isinstance(result, dict)
         llm_output = result["llm_output"]
-        assert isinstance(llm_output, AsyncGenerator)
-        combined = ""
-        async for chunk in llm_output:
-            assert isinstance(chunk, str)
-            combined += chunk
-        assert "apple" in combined
+        assert isinstance(llm_output, str)
+        assert "apple" in llm_output.lower()
 
     @pytest.mark.asyncio
     async def test_first_match_text_streaming(self, prompty_config: Dict[str, Any]):
@@ -196,7 +192,7 @@ async def test_first_match_text_json_streaming(self, prompty_config: Dict[str, A
     async def test_full_text(self, prompty_config: Dict[str, Any]):
         prompty_config["model"]["response"] = "full"
         prompty = AsyncPrompty(BASIC_PROMPTY, **prompty_config)
-        result = await prompty(question="What is the capital of France?", firstName="Barbra", lastName="Streisand")
+        result = await prompty(firstName="Bob", question="What is the capital of France?")
         assert isinstance(result, dict)
         llm_output = result["llm_output"]
         assert isinstance(llm_output, ChatCompletion)