Added Random Replacement cache

[KevinMwita7]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.37037% with 5 lines in your changes missing coverage. Please review.

Project coverage is 74.27%. Comparing base (ae71861) to head (884fa29).

Files with missing lines	Patch %	Lines
...m/thealgorithms/datastructures/caches/RRCache.java	95.37%	3 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6306      +/-   ##
============================================
+ Coverage     74.16%   74.27%   +0.11%     
- Complexity     5362     5387      +25     
============================================
  Files           678      679       +1     
  Lines         18686    18794     +108     
  Branches       3625     3642      +17     
============================================
+ Hits          13858    13959     +101     
- Misses         4273     4277       +4     
- Partials        555      558       +3     

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