change test method names in TestDatastoreFacade
implement delete bookmark by id in facade
implement delete bookmark by id in MongoBookmarksDatastore
refactor TestMongoBookmarksDatastore
refactor MongoBookmarksDatastore
add override annotations in MongoBookmarksDatastore
add DELETE_BOOKMARK to route constants
create DeleteBookmarkByIdRoute without authorization check
deal with authorization in route to delete bookmark by id
extend RestApi and SparkFacade to deal with bookmark deletion
create delete bookmark route in main method
add missing override annotations to SparkRestApi
move dropCollection with after annotation after the test methods
fix DELETE_BOOKMARK route constant
add integration test to check if a bookmark can be deleted
refactor canPostBookmark test in TestRestApi
refactor TestRestApi
create OptionsForIdRoute
implement OPTIONS for bookmark id route in SparkFacade and RestApi
create integration test for the options for id route