Use oauth2 from google-auth
oauth2client is deprecated [1], use google-auth.
When kubernetes-client/base-python is updated to not use
oauth2client, remove oauth2client.
[1] (see Note)
Closes:
@@ -5,5 +5,6 @@ setuptools>=21.0.0 # PSF/ZPL
urllib3>=1.19.1,!=1.21 # MIT
pyyaml>=3.12 # MIT
oauth2client>=4.0.0 # Apache-2.0
+google-auth>=1.0.1 # Apache-2.0
ipaddress>=1.0.17 # PSF
websocket-client>=0.32.0 # LGPLv2+
