Experimentally revert "parallelize sbt tests"
Experimentally revert "parallelize sbt tests"

This reverts commit a0ea772cfc2528bfdf2bcc3e7723355e3ee61a17.

arex1337/lila,luanlv/lila,luanlv/lila,luanlv/lila,arex1337/lila,arex1337/lila,luanlv/lila,luanlv/lila,luanlv/lila,arex1337/lila,arex1337/lila,arex1337/lila,arex1337/lila,luanlv/lila