jenkins: orca learn ray tests stuck(linux)

[pinggao187]

Running orca learn ray tests
============================= test session starts ==============================
platform linux -- Python 3.6.10, pytest-5.4.1, py-1.8.1, pluggy-0.12.0 -- /opt/work/conda/envs/py36/bin/python
cachedir: .pytest_cache
rootdir: /opt/work/jenkins/workspace/ZOO-NB-UnitTests-3.1-PYTHON/pyzoo
plugins: xdist-1.31.0, forked-1.1.2
collecting ... collected 15 items

../test/zoo/orca/learn/ray/mxnet/test_mxnet_gluon.py::TestMXNetGluon::test_gluon PASSED [  6%]
../test/zoo/orca/learn/ray/mxnet/test_mxnet_gluon_multiple_input.py::TestMXNetGluonMultipleInput::test_gluon_multiple_input Build was aborted

jenkins link: http://10.112.231.51:18888/job/ZOO-NB-UnitTests-3.1-PYTHON/291/console

[pinggao187]

mac: jenkins: test timeout(mac) #4747