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