Log rhino exception with info of the file in which the exception occurs.

Currently, ScriptableFuture ignores the file info. This patch makes
ScriptableFuture log the info to help debugging.
Change logging level to debug on dev mode.
Run Play application in JavaScript console.

Many Play libraries depend on Play application. The same reason with
plugin test runner.
Change mongodb and zookeeper path to data/test for test target.

Other targets use data/{target_name} for their paths.
Add test case for ScriptableUUID.

It tests the basic functionality of the module.