[GitHub] flink issue #4748: [hotfix][tests] Use G1GC for tests

[pnowojski]

Github user pnowojski commented on the issue:

    https://github.com/apache/flink/pull/4748
  
    Mostly for consistency, however using Serial GC on it's own doesn't seem 
like a better idea compared t G1GC (avoiding long pauses)


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