Fix #490: Pass scala.Array to partests (rather than js.Array)
Fix partest classification lists for 2.11.0-RC4

The classification was wrong because of
9d6995b546e06655fe989a17e4f19890340f050e which merged across the
boundary with and without boxing. The tests which relied on particular
behaviour with boxing (notably toString), were wrongly classified.
Add scala 2.11.0-final, remove all milestones and RCs