init etcd2 client

[Revolution1]

No description provided.

[codecov]

Codecov Report

Merging #28 into master will decrease coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #28      +/-   ##
==========================================
- Coverage   91.17%   91.13%   -0.04%     
==========================================
  Files          51       51              
  Lines        2786     2786              
  Branches      286      286              
==========================================
- Hits         2540     2539       -1     
- Misses        147      148       +1     
  Partials       99       99

Impacted Files	Coverage Δ
etcd3/swagger_helper.py	77.47% <100%> (-0.4%)	⬇️

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