Add ray.util package and move libraries from experimental (#7100)

python/ray/serve/tests/conftest.py

@@ -0,0 +1,28 @@
+import os
+import tempfile
+
+import pytest
+
+import ray
+from ray import serve
+
+
+@pytest.fixture(scope="session")
+def serve_instance():
+    _, new_db_path = tempfile.mkstemp(suffix=".test.db")
+    serve.init(
+        kv_store_path=new_db_path,
+        blocking=True,
+        ray_init_kwargs={"num_cpus": 36})
+    yield
+    os.remove(new_db_path)
+
+
+@pytest.fixture(scope="session")
+def ray_instance():
+    ray_already_initialized = ray.is_initialized()
+    if not ray_already_initialized:
+        ray.init(object_store_memory=int(1e8))
+    yield
+    if not ray_already_initialized:
+        ray.shutdown()