plan: Add support to display CPU Burst

[wpjunior]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (5b5f8cc) 71.44% compared to head (d4781f7) 71.55%.
Report is 1 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #214      +/-   ##
==========================================
+ Coverage   71.44%   71.55%   +0.10%     
==========================================
  Files          44       44              
  Lines        8223     8296      +73     
==========================================
+ Hits         5875     5936      +61     
- Misses       1521     1527       +6     
- Partials      827      833       +6     

Files	Coverage Δ
tsuru/client/apps.go	77.15% <81.81%> (+<0.01%)	⬆️
tsuru/client/plan.go	84.61% <85.50%> (-0.30%)	⬇️

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[crgisch]

LGTM 👍