redis 2.8.16
redis: update 2.8.16 bottle.

Closes #32335.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Updated Sphinx to 2.2.4
Removed libstemmer fix as its now is correct
redis: update 2.8.16 bottle.
sphinx: update 2.2.4 bottle.