Fix tests; add missing elements to as_is_fields

Added structured_itineraries and accommodation_dossier
to the _as_is_fields for Tour Dossier and Accommodation
resources respectively.
Merge pull request #6 from gadventures/fix_tests

Fix tests; add missing elements to as_is_fields
Merge branch 'master' of github.com:gadventures/gapipy into add_query_get_resource_data