Fixing get Google default credentials method

[gabrielgbim]

This should fix the following error:

Traceback (most recent call last):
  File "watch-namespace.py", line 4, in <module>
    config.load_kube_config()
  File "egg/kubernetes/config/kube_config.py", line 318, in load_kube_config
  File "egg/kubernetes/config/kube_config.py", line 221, in load_and_set
  File "egg/kubernetes/config/kube_config.py", line 160, in _load_authentication
  File "egg/kubernetes/config/kube_config.py", line 176, in _load_gcp_token
  File "egg/kubernetes/config/kube_config.py", line 124, in <lambda>
NameError: global name 'GoogleCredentials' is not defined

[codecov-io]

Codecov Report

Merging #21 into master will decrease coverage by 0.5%.
The diff coverage is 55.55%.

@@            Coverage Diff             @@
##           master      #21      +/-   ##
==========================================
- Coverage   94.69%   94.19%   -0.51%     
==========================================
  Files           9        9              
  Lines         698      706       +8     
==========================================
+ Hits          661      665       +4     
- Misses         37       41       +4

Impacted Files	Coverage Δ
config/kube_config.py	94.53% <55.55%> (-2.04%)	⬇️

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[mbohlool]

Yes, we need to fix this. I tried your fix and it almost worked, except it is taking a long time. The other fix is to run the auth-cmd directly (kubectl is doing that). I am investigating this more.

[mbohlool]

I think we need to also write token back to kube config file. Can you please fix tests so we can merge this?

[gabrielgbim]

I'm trying to fix tests, but I couldn't find what is wrong.

Can you help me on how to run and identify what test has failed?

Running the following:

$:~/git/python-base$ export TOXENV=update-pep8
$:~/git/python-base$ ./run_tox.sh tox

Got:

  update-pep8: commands succeeded
  congratulations :)

[mbohlool]

run scripts/update-pep8.sh

[mbohlool]

@gabrielgbim I sent a follow up PR for this to add expiration mechanism as well as persisting config. I will merge it after your PR. When you fixed tests here, can you review that PR?

[mbohlool]

@gabrielgbim Are you going to fix this PR or I should go ahead with my other PR?

[gabrielgbim]

@mbohlool You can go ahead with the other one.

[pokoli]

@gabrielgbim then you should probably close this one.

Also it will be gret if you can test and review the other PR.

Thanks for your time.

[mbohlool]

Closing in favor of #22