Provider Rancher

[futuretea]

Signed-off-by: futuretea [email protected]

After we support rancher, the following clusters will be support in kubecm

1. cluster imported to Rancher
2. cluster created by Rancher
   

Related issues
#44

[codecov]

Codecov Report

Merging #331 (a4ff4a8) into master (a3f2a25) will decrease coverage by 0.37%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #331      +/-   ##
==========================================
- Coverage   11.92%   11.54%   -0.38%     
==========================================
  Files          17       17              
  Lines        1619     1671      +52     
==========================================
  Hits          193      193              
- Misses       1409     1461      +52     
  Partials       17       17              

Flag	Coverage Δ
unittests	11.54% <0.00%> (-0.38%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/cloud.go	6.18% <0.00%> (-1.35%)	⬇️

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[sunny0826]

LGTM