'Empty Mongo at the start of every test'

def setUp(self):

    self.choosy_docman = DocManager(self.standalone.uri, use_single_meta_collection=self.use_single_meta_collection)
    self.mongo_conn.drop_database('__mongo_connector')
    self._remove()
    conn = self.standalone.client()
    for ns in self.namespaces_inc:
        (db, coll) = ns.split('.', 1)
        conn[db][coll].drop()
