Add exception handling when retrieving k8s client

[geerlingguy]

See #49.

[codecov]

Codecov Report

Merging #54 into master will increase coverage by 0.04%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master      #54      +/-   ##
==========================================
+ Coverage   43.28%   43.33%   +0.04%     
==========================================
  Files           3        3              
  Lines         536      540       +4     
  Branches      109      109              
==========================================
+ Hits          232      234       +2     
- Misses        261      263       +2     
  Partials       43       43              

Impacted Files	Coverage Δ
plugins/module_utils/raw.py	39.16% <60.00%> (+0.11%)	⬆️

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