WebStyle: goto regression test fixes

* Improves goto_engine related regression tests to take into account
  recent modification to the Atlantis Demo site, in particular
  with respect to restriction and file formats.
  (closes #1293)

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
`4: I102 copyright year is outdated, expected 2014 but got 2013` !