redisCache: Create function DoCommand method to execute any Redis command

[yderana]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 17.24%. Comparing base (7c0f5a7) to head (8ef0a5c).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
cache/cache.go	0.00%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #55      +/-   ##
==========================================
- Coverage   17.30%   17.24%   -0.07%     
==========================================
  Files          54       54              
  Lines        4161     4176      +15     
==========================================
  Hits          720      720              
- Misses       3416     3431      +15     
  Partials       25       25              

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