Downgraded sbteclipse version since the newest does not handle project

dependency in correct way.

Author: mmalohlava

h2o-scala/project/eclipse.sbt

@@ -1,4 +1,4 @@
 // Enable the following line to create Eclipse project by typing eclipse in sbt shell
 // See https://github.com/typesafehub/sbteclipse
-addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.4.0")
+addSbtPlugin("com.typesafe.sbteclipse" % "sbteclipse-plugin" % "2.3.0")