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
Split runner.js into separate components.
Fix some issues with indexed field of insert workloads.
Have workloads preserve data files.
Add necessary concurrency test files.