Add verbose logging

[r2d4]

fixes #2053

[codecov-io]

Codecov Report

Merging #2078 into master will increase coverage by 0.01%.
The diff coverage is 50%.

@@            Coverage Diff             @@
##           master    #2078      +/-   ##
==========================================
+ Coverage    28.9%   28.92%   +0.01%     
==========================================
  Files          81       81              
  Lines        5304     5311       +7     
==========================================
+ Hits         1533     1536       +3     
- Misses       3578     3582       +4     
  Partials      193      193

Impacted Files	Coverage Δ
cmd/minikube/cmd/start.go	9.81% <0%> (-0.13%)	⬇️
pkg/minikube/cluster/cluster.go	31.05% <100%> (+0.71%)	⬆️

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