Fix for Travis CI failing on python-base

[micw523]

This PR solves the problem introduced into python-base from kubernetes-client/python#665. Should solve build failure reported in #92.
/cc @roycaihw
/this-is-fine

[k8s-ci-robot]

@micw523:

In response to this:

This PR solves the problem introduced into python-base from kubernetes-client/python#665. Should solve build failure reported in #92.
/cc @roycaihw
/this-is-fine

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[codecov-io]

Codecov Report

Merging #99 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #99   +/-   ##
=======================================
  Coverage   91.72%   91.72%           
=======================================
  Files          13       13           
  Lines        1136     1136           
=======================================
  Hits         1042     1042           
  Misses         94       94

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[roycaihw]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: micw523, roycaihw

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