ENYO-1740: update Ares test suite according to modules changes

- update ide.js accordingly
- Split fsLocal.spec.js into ares.spec.js (with command-line args)
  and fs.spec.js, preparing the field for fsDropbox.
- Update README.md pages accordingly

Enyo-DCO-1.1-Signed-off-by: Francois-Xavier KOWALSKI <francois-xavier.kowalski@hp.com>