lsp-java: Changes for NixOS (#445) #175

Job	Run time
test (ubuntu-latest, 26.3)	1m 25s
test (ubuntu-latest, 27.2)	1m 28s
test (ubuntu-latest, 28.2)	2m 11s
test (ubuntu-latest, snapshot)	1m 39s
test (macos-latest, 26.3)	4m 39s
test (macos-latest, 27.2)	5m 2s
test (macos-latest, 28.2)	4m 42s
test (macos-latest, snapshot)	5m 37s
test (windows-latest, 26.3)	3m 9s
test (windows-latest, 27.2)	2m 6s
test (windows-latest, 28.2)	2m 35s
test (windows-latest, snapshot)	33s
	35m 6s

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