Added Summary Columns for ConfigAudits and KubeHunter Reports

[danielsagi]

This PR adds additional printer columns to show summary for ConfigAudits and KubeHunter reports. (like already implemented for vulnerabilities reports)

Examples

Config Audits

$ k get configaudit -o wide                                        
NAME                          SCANNER   AGE     DANGER   WARNING
deployment.nginx-deployment   Polaris   6m31s   0        16

kube-hunter

$ k get kubehunter -o wide    
NAME      SCANNER       AGE   HIGH   MEDIUM   LOW
cluster   kube-hunter   3s    1      1        1

As described in the following issues

Closes #149
Closes #148

[codecov]

Codecov Report

Merging #158 into master will decrease coverage by 0.32%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #158      +/-   ##
==========================================
- Coverage   33.31%   32.99%   -0.33%     
==========================================
  Files          33       33              
  Lines        1639     1655      +16     
==========================================
  Hits          546      546              
- Misses        997     1013      +16     
  Partials       96       96              

Impacted Files	Coverage Δ
pkg/polaris/converter.go	2.04% <0.00%> (-0.99%)	⬇️

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[danielpacak]

LGTM! 🚀