fix: Fix the test_mock_disaggregated_serving on multi-GPU machines (#117)

Co-authored-by: Piotr Marcinkiewicz <piotrm@nvidia.com>
Co-authored-by: Neelay Shah <neelays@nvidia.com>

runtime/tests/python/conftest.py

@@ -75,7 +75,7 @@ def api_server(log_dir):
             process = subprocess.Popen(
                 command, stdin=subprocess.DEVNULL, stdout=output_, stderr=output_err
             )
-            time.sleep(5)
+            time.sleep(10)
             yield process
             process.terminate()
             process.wait()