Revert creating .scala-build in temporary directory

[tgodzik]

This causes issues with semanticdb, because source root is also set to that build directory and semanticdb ends up in the wrong place.

[kasiaMarek]

Though I wonder if we shouldn't keep disconnectOldBuildServer().asJava.get(100, TimeUnit.MILLISECONDS). Otherwise on exit we don't wait for it and do System.exit(0).

[tgodzik]

Though I wonder if we shouldn't keep disconnectOldBuildServer().asJava.get(100, TimeUnit.MILLISECONDS). Otherwise on exit we don't wait for it and do System.exit(0).

Makes sense, added it back!