Update cassandra to 2.0.10.

Changes in 2.0.10
======
- CqlPaginRecordReader and CqlPagingInputFormat have both been removed.
  Use CqlInputFormat instead.
- If you are using Leveled Compaction, you can now disable doing size-tiered
  compaction in L0 by starting Cassandra with -Dcassandra.disable_stcs_in_l0
  (see CASSANDRA-6621 for details).
- Shuffle and taketoken have been removed.  For clusters that choose to
  upgrade to vnodes, creating a new datacenter with vnodes and migrating is
  recommended. See http://goo.gl/Sna2S1 for further information.

2.0.9
=====
- Default values for read_repair_chance and local_read_repair_chance have been
  swapped. Namely, default read_repair_chance is now set to 0.0, and default
  local_read_repair_chance to 0.1.
- Queries selecting only CQL static columns were (mistakenly) not returning one
  result per row in the partition. This has been fixed and a SELECT DISTINCT
  can be used when only the static column of a partition needs to be fetch
  without fetching the whole partition. But if you use static columns, please
  make sure this won't affect you (see CASSANDRA-7305 for details).

2.0.8
=====
- New snitches have been used for users of Google Compute Engine and of
  Cloudstack.
Add apache-cassandra21