fix: fix time.sleep() call

Author: dbasunag

tests/model_serving/model_server/kserve/inference_graph/conftest.py

@@ -80,7 +80,7 @@ def kserve_raw_headless_service_config(
         else:
             logger.warning(msg="No KServe controller deployment found")
         logger.info(msg="Waiting for KServe controller to process configuration change...")
-        time.sleep()
+        time.sleep(60)
 
         yield dsc_resource