Rename the async keyword argument to async_req

[ojarjur]

The Python Kubernetes client recently changed the name of the async keyword parameter in its API to async_req.

This change makes the corresponding change to our calls to that API, which is necessary for the tf-operator code to work against the latest version of the Kubernetes client code.

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This change is 

[ojarjur]

/assign @gaocegege

[coveralls]

Coverage decreased (-0.07%) to 57.957% when pulling 74639c0 on ojarjur:patch-2 into b5809d5 on kubeflow:master.

[ojarjur]

It seems that I need to update the pipenv as well as part of this change.

Version 7.0.0 of the kubernetes library is backwards incompatible with previous versions of it. As such, we will need to update our requirements to say kubernetes>=7.0.0 instead of kubernetes>=4.0.0.

[ojarjur]

/retest

[ojarjur]

/retest

[gaocegege]

/retest

[ChanYiLin]

@jlewi
I think why it failed the presubmit is because our testing still use kubernetes 4.0.0
so I try to update it to 7.0.0 in kubeflow/testing kubeflow/testing#194

Would you help to have a look, Thanks!

[ChanYiLin]

/retest
/lgtm

[jlewi]

I've pushed a new test worker image:
gcr.io/kubeflow-ci/test-worker:v20180822-d8bc7c8-e3b0c4
and tagged it latest.

[jlewi]

/test all

[gaocegege]

/retest

[ChanYiLin]

3 tests failed: /py/prow_test.py, /py/release_test.py, /py/util_test.py.
INFO|2018-08-23T05:00:28|test_py_checks.py:23| Running py_test
INFO|2018-08-23T05:00:28|util.py:41| Running: python /mnt/test-data-volume/kubeflow-tf-operator-presubmit-v1-790-74639c0-968-cda2/src/kubeflow/tf-operator/py/prow_test.py 
cwd=/mnt/test-data-volume/kubeflow-tf-operator-presubmit-v1-790-74639c0-968-cda2/src/kubeflow/tf-operator
INFO|2018-08-23T05:00:28|util.py:56| Subprocess output:

INFO|2018-08-23T05:00:29|util.py:62| Traceback (most recent call last):
INFO|2018-08-23T05:00:29|util.py:62| File "/mnt/test-data-volume/kubeflow-tf-operator-presubmit-v1-790-74639c0-968-cda2/src/kubeflow/tf-operator/py/prow_test.py", line 4, in <module>
INFO|2018-08-23T05:00:29|util.py:62| import mock
INFO|2018-08-23T05:00:29|util.py:62| File "/usr/local/lib/python2.7/dist-packages/mock/__init__.py", line 2, in <module>
INFO|2018-08-23T05:00:29|util.py:62| import mock.mock as _mock
INFO|2018-08-23T05:00:29|util.py:62| File "/usr/local/lib/python2.7/dist-packages/mock/mock.py", line 80, in <module>
INFO|2018-08-23T05:00:29|util.py:62| import funcsigs
INFO|2018-08-23T05:00:29|util.py:62| ImportError: No module named funcsigs

@jlewi
Do we also have to add funcsigs into kubeflow/testing images/Pipfile ?
It seems it has dependency on mock in python2

[jlewi]

Yes. I have a fix in kubeflow/testing#195 and a new image should be pushed.

/test all

[ChanYiLin]

/lgtm

[ChanYiLin]

@ojarjur
Thanks for your contribution!

@jlewi
We successfully pass all the tests.
I think we can merge this PR and other PR can then move forward.
Thanks

[jlewi]

/approve

[k8s-ci-robot]

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