Adds support for Scala 2.12
To squash
Forgot to update the folder names
Copy the needed files
THIS CHANGE NEED TO REVIEWED BEFORE PR

Remove the dependency to the bundled Scala 2.10
One more trace of 2.10
Typo to squash
Adds 2.12 support in ScalaInstallationTests
Adds 2.12 support to ClasspathTests
Adds support for 2.12 in breakpoint tests
Bumps to master sbt version