Fixes#967
Frozen lists are just atomic cells. However, old code inserted the
frozen data directly as an atomic_cell_or_collection, which in turn
meant it lacked the header data of a cell. When in turn it was
handled by internal serialization (freeze), since the schema said
is was not a (non-frozen) collection, we tried to look at frozen
list data as cell header -> most likely considered dead.
Message-Id: <1457432538-28836-1-git-send-email-calle@scylladb.com>
(cherry picked from commit 8575f1391f)
4e3b98f281