locator: Do not generate wrap-around ranges
locator: Do not generate wrap-around ranges

Like we did in commit d54c77d5d0ecbab8fc902071b2f4cc7dbe2b57c4,
make the remaining functions in abstract_replication_strategy return
non-wrap-around ranges.

This fixes:

ERROR [shard 0] stream_session - [Stream #f0b7fda0-cf3e-11e5-b6c4-000000000000]
stream_transfer_task: Fail to send to 127.0.0.4:0: std::runtime_error (Not implemented: WRAP_AROUND)

in streaming.
Message-Id: <8aff259b1118542dfccda21e8ff99f94adaced71@scylladb.com>

duarten/scylla,avikivity/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,raphaelsc/scylla,duarten/scylla,avikivity/scylla,scylladb/scylla,kjniemi/scylla,raphaelsc/scylla,kjniemi/scylla,raphaelsc/scylla,kjniemi/scylla,duarten/scylla