[https://nvbugs/5747911][fix] Use offline data path for the unit test of mmencoder server (#10135)

Signed-off-by: Chang Liu (Enterprise Products) <[email protected]>

Author: chang-l

tests/integration/test_lists/waives.txt

@@ -459,7 +459,6 @@ accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16_4gpus[tp2pp2
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_bfloat16_4gpus[tp4-mtp_nextn=2-attention_dp=True-cuda_graph=True-overlap_scheduler=True-torch_compile=True] SKIP (https://nvbugs/5740075)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_nvfp4_4gpus[moe_backend=CUTLASS-mtp_nextn=2-tp2pp2-fp8kv=True-attention_dp=True-cuda_graph=True-overlap_scheduler=True-torch_compile=False] SKIP (https://nvbugs/5740075)
 accuracy/test_llm_api_pytorch.py::TestDeepSeekV3Lite::test_nvfp4_4gpus[moe_backend=CUTLASS-mtp_nextn=2-tp4-fp8kv=True-attention_dp=True-cuda_graph=True-overlap_scheduler=True-torch_compile=False] SKIP (https://nvbugs/5740075)
-test_e2e.py::test_openai_mmencoder_example SKIP (https://nvbugs/5747911)
 test_e2e.py::test_trtllm_serve_multimodal_example SKIP (https://nvbugs/5747920)
 examples/test_whisper.py::test_llm_whisper_general[large-v3-disable_gemm_plugin-enable_attention_plugin-disable_weight_only-float16-nb:1-use_cpp_runtime] SKIP (https://nvbugs/5747930)
 test_e2e.py::test_trtllm_serve_example SKIP (https://nvbugs/5747938)

tests/unittest/llmapi/apps/_test_openai_mmencoder.py

@@ -5,6 +5,7 @@
 import pytest
 import requests
 import yaml
+from utils.llm_data import llm_models_root
 
 from ..test_llm import get_model_path
 from .openai_server import RemoteMMEncoderServer
@@ -69,7 +70,8 @@ def async_client(server: RemoteMMEncoderServer):
 def test_multimodal_content_mm_encoder(client: openai.OpenAI, model_name: str):
 
     content_text = "Describe the natural environment in the image."
-    image_url = "https://huggingface.co/datasets/YiYiXu/testing-images/resolve/main/seashore.png"
+    image_url = str(llm_models_root() / "multimodals" / "test_data" /
+                    "seashore.png")
     messages = [{
         "role":
         "user",