Add teardown_module to test_queue.py

[williamma12]

What do these changes do?

Adds a teardown_module to test_queue.py in order to ensure that after test_queue.py finishes running, that there is no ray process still running.

Related issue number

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/11761/
Test FAILed.

[robertnishihara]

This should be unnecessary if we are passing ray_start in everywhere, right?

[williamma12]

Oops sorry I thought I took out ray_start since it did not work for test_async for some reason

[robertnishihara]

Does it actually not work with test_async? Any idea why that is?

[williamma12]

I'm not really sure, it just hangs on when we try to get the results result = set(ray.get(consumers)) from the Queue https://github.com/ray-project/ray/pull/4012/files#diff-a97079c8e5770f39616578c37673e242R56

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/11795/
Test FAILed.

[AmplabJenkins]

Test FAILed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/11803/
Test FAILed.

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/11821/
Test PASSed.

[robertnishihara]

I suspect the issue had to do with defining the remote functions outside of the tests. I pushed some small changes.

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/11845/
Test PASSed.