SERVER-14352 Significant improvements to RocksDB storage engine.

Incorporates a number of changes since the MongoDB World demo.

Closes #742

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-14806: Improve get_ipaddr parsing in JS tests

Closes #741

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-14848 Add index_id_desc.js to core suite
Merge remote-tracking branch 'upstream/master'