ENYO-2195: Ares Test: Selenium Tests broken need to be re-adjusted according to ENYO-1020

Ready for Review.

Summary:
Selenium xml-scripts dedicated to phobos are re-adjusted according to ENYO-1020, as:
- object id=ares_phobos_documentLabel does not exist anymore, and,
- new object id=ares_phobos_button is introduced

Following xml-scripts are updated to reference now object id=ares_phobos_button and no more object id=ares_phobos_documentLabel:
- PhobosFileButton,
- PhobosSaveAndQuit, and,
- PhobosNewKind.

Enyo-DCO-1.1-Signed-off-by: Marie-Antoinette de Bonis-Hamelin (Marian)
marie-antoinette.de-bonis-hamelin@hp.com