SERVER-10657 wait longer for replication in replsets_prefetch_stress.js

Because the nodes can still be very busy doing replication while we're
trying to poll the replication status, it can time out before we've even
done one assert.soon loop.
SERVER-6376 small refactor to eliminate redundant code
SERVER-10654 background index builds on slaves are no longer synchronous
SERVER-10678 Log a warning but do not throw when unable to determine local address of a socket.
SERVER-10231 disallow creation of indexes on system.indexes
SERVER-6405: removed dead code
SERVER-6405: move rename into database