cassandra 2.0.7

Upgraded to Cassandra 2.0.7

Closes #28667.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
tree 1.7.0

with additional clean-up
tree: update 1.7.0 bottle.

Closes #28664.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
nginx 1.6.0
cassandra: add 2.0.7 bottle.
nginx: update 1.6.0 bottle.