Disable parallelism in the scalacheck suite
Disable parallelism in the scalacheck suite

This is a workaround for a race condition we identified:

  https://github.com/scala/scala-jenkins-infra/issues/249

A future SBT version will include this fix:

  https://github.com/sbt/sbt/pull/3985

martijnhoekstra/scala,lrytz/scala,scala/scala,scala/scala,lrytz/scala,martijnhoekstra/scala,lrytz/scala,scala/scala,lrytz/scala,scala/scala,lrytz/scala,martijnhoekstra/scala,martijnhoekstra/scala,martijnhoekstra/scala,lrytz/scala,scala/scala,scala/scala,martijnhoekstra/scala