/collections/:cid/items/:iid already does db lookup/authz with CanCan
replace db call collection.items with ES search
in support of e43b8c15956b5302eeff081ceb8bf71de20bf1ea, make default_storage_id mass-assignable for db:seed
refactor spec helper a little so it is easier to en/disable ES test server
the /api/items namespace is never used for just the base item. that is what /collections/:collid/item/:item_id is for.
rename attribute/method name so as not to collide with magic singular stuff of cancan
api_item_path no longer defined for us
Merge pull request #618 from popuparchive/collection-items-as-search

Collection items as search
small refactor to delineate seed test db from running/building ES index