Make elemental tests compile. Set ant task to run them.

- For some reason elemental tests were disabled, enabling them
  in order to realise when the api changes, or something breaks it.
- Fixing compilation, and disabling broken tests which have to
  be fixed in separated patches.

Change-Id: I06befa1b26efe55ad6964c582283adcb8efcfa1e
13 files changed