[JENKINS-54566] finalize vs. flush#83

Merged

dwnusbaum merged 7 commits intojenkinsci:masterfrom

jglick:finalize-JENKINS-54566

Nov 19, 2018

Commits on Nov 15, 2018

[JENKINS-54566] Reproducing warning sometimes from FileLogStorageTest.
jglick
committed

Commits on Nov 19, 2018

Factored out GCFlushedOutputStream, and reverting 4bef56fe1ea425a8c477a9364b0d64ad97f52341 so that DelayBufferedOutputStream is again a BufferedOutputStream.
jglick
committed