Skip sporadic Zlib::BufError failures in JRuby tests #429

Job	Run time
Unit test (ubuntu-20.04, 2.1)	54s
Unit test (ubuntu-20.04, 2.2)	1m 6s
Unit test (ubuntu-20.04, 2.3)	1m 6s
Unit test (ubuntu-20.04, 2.4)	56s
Unit test (ubuntu-20.04, 2.5)	34s
Unit test (ubuntu-20.04, 2.6)	29s
Unit test (ubuntu-20.04, 2.7)	32s
Unit test (ubuntu-20.04, 3)	8s
Unit test (ubuntu-20.04, 3.1)	21s
Unit test (ubuntu-20.04, 3.2)	16s
Unit test (ubuntu-20.04, 3.3)	17s
Unit test (ubuntu-20.04, jruby-9.1)	56s
Unit test (ubuntu-20.04, jruby-9.2)	54s
Unit test (ubuntu-20.04, jruby-9.3)	53s
Unit test (ubuntu-20.04, jruby-9.4)	49s
Unit test (ubuntu-20.04, truffleruby)	1m 49s
Unit test (macos-latest, 2.6)	41s
Unit test (macos-latest, 2.7)	45s
Unit test (macos-latest, 3)	15s
Unit test (macos-latest, 3.1)	18s
Unit test (macos-latest, 3.2)	21s
Unit test (macos-latest, 3.3)	25s
Unit test (macos-latest, jruby-9.3)	32s
Unit test (macos-latest, jruby-9.4)	48s
Unit test (macos-latest, truffleruby)	1m 44s
Unit test (windows-latest, 2.2)	1m 59s
Unit test (windows-latest, 2.3)	2m 15s
Unit test (windows-latest, 2.4)	2m 20s
Unit test (windows-latest, 2.5)	3m 8s
Unit test (windows-latest, 2.6)	2m 52s
Unit test (windows-latest, 2.7)	3m 39s
Unit test (windows-latest, 3)	3m 8s
Unit test (windows-latest, 3.1)	1m 34s
Unit test (windows-latest, 3.2)	1m 40s
Unit test (windows-latest, 3.3)	3m 33s
finish	0s
	43m 57s

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