Move more unit tests to bazel (#6250)

* move more unit tests to bazel

* move to avoid conflict

* fix lint

* fix deps

* seprate

* fix failing tests

* show tests

* ignore mismatch

* try combining bazel runs

* build lint

* remove tests from install

* fix test utils

* better config

* split up

* exclusive

* fix verbosity

* fix tests class

* cleanup

* remove flaky

* fix metrics test

* Update .travis.yml

* no retry flaky

* split up actor

* split basic test

* split up trial runner test

* split stress

* fix basic test

* fix tests

* switch to pytest runner for main

* make microbench not fail

* move load code to py3

* test is no longer package

* bazel to end

python/ray/tests/test_object_manager.py

@@ -11,7 +11,7 @@ import time
 import warnings
 
 import ray
-from ray.tests.cluster_utils import Cluster
+from ray.cluster_utils import Cluster
 
 # TODO(yuhguo): This test file requires a lot of CPU/memory, and
 # better be put in Jenkins. However, it fails frequently in Jenkins, but
@@ -325,3 +325,9 @@ def test_many_small_transfers(ray_start_cluster_with_resource):
     do_transfers()
     do_transfers()
     do_transfers()
+
+
+if __name__ == "__main__":
+    import pytest
+    import sys
+    sys.exit(pytest.main(["-v", __file__]))