Fix ListTable.extend and added test for ListTable methods
Fix ListTable.extend and added test for ListTable methods


Former-commit-id: a73f022009520459f9920ee36a720961e2154f13
exonum/exonum,alekseysidorov/exonum,exonum/exonum,exonum/exonum,alekseysidorov/exonum,exonum/exonum,alekseysidorov/exonum,alekseysidorov/exonum