SERVER-16454 do not run replset/index_restart_secondary.js on 32-bit builders
SERVER-16321 Re-enable v28_bad_upgrade_order.js, 2_test_launching_cluster.js
SERVER-16405 Expand replication command tests.

Closes #881

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
TOOLS-492 stat1.js should explicitly specify --authenticationDatabase

Closes #880

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-16515 change RecordAccessTracker to be per-MMAPv1 engine, not per-MMAPv1 database
SERVER-16493: Have Client own Locker to amortize initialization cost