haskell-language-java: go back to version 0.2.5

This reverts commit 416bd743f086f77f0d0b31e0fcd9edbe80dd0e92. Version 0.2.5.1
seems to have disappeared from Hackage.
haskell-darcs: re-generate expression with recent version of cabal2nix
haskell-HFuse: re-generate expression with recent version of cabal2nix
haskell-ghc-heap-view: re-generate expression with recent version of cabal2nix
haskell-ghc-mod: re-generate expression with recent version of cabal2nix
haskell-ghc-vis: re-generate expression with recent version of cabal2nix
haskell-lhs2tex: re-generate expression with recent version of cabal2nix