Set mainProj/Test/classLoaderLayeringStrategy
Set mainProj/Test/classLoaderLayeringStrategy

The TestDependencies strategy doesn't work as of 1.3.0-RC1 because some
of the tests need to access resources. The ScalaLibrary strategy is
broken in 1.3.0-RC1. That leaves Flat. I tested that with 1.3.0-SNAPSHOT
off the latest master, that the AllLibraryJars strategy works fine, but
I need this change now to get travis to work.

xuwei-k/xsbt,xuwei-k/xsbt,mdedetrich/sbt,sbt/sbt,sbt/sbt,xuwei-k/xsbt,mdedetrich/sbt,mdedetrich/sbt,mdedetrich/sbt,xuwei-k/xsbt,mdedetrich/sbt,mdedetrich/sbt,sbt/sbt,mdedetrich/sbt,sbt/sbt,sbt/sbt,sbt/sbt,sbt/sbt,xuwei-k/xsbt