[GitHub] flink issue #4590: [FLINK-7513][tests] remove TestBufferFactory#MOCK_BUFFER

[tillrohrmann]

Github user tillrohrmann commented on the issue:

    https://github.com/apache/flink/pull/4590
  
    Thanks for your contribution @NicoK and the review @pnowojski. Merging this 
PR. 


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