Fixed cassandra read/write consistency level in _LazyPreparedStatements
Fixed cassandra read/write consistency level in _LazyPreparedStatements

 - The _LazyPreparedStatements function was called without the
   last two arguments (supposed to set data read/write consistency).
   This was preventing the setting of these argumentis to values
   different form  the default ones.

Signed-off-by: Jean-Francois Weber-Marx <6368ae23528c722d498f65d070ae0cc3096a0146@hotmail.com>

criteo/biggraphite,criteo/biggraphite,criteo/biggraphite,criteo/biggraphite