SERVER-16419 use reconfig function for reconfiguration in jstests
SERVER-16411 jstests for upgrade/downgrade standalone nodes from 2.6 to 2.8 and 2.8 WT
SERVER-16421 sharding_rs2.js should clean up data on all replicas
SERVER-16422 overwite minvalid rather than inserting a new document
SERVER-16101 replace UpdateExecutor with ParsedUpdate
SERVER-16101 replace DeleteExecutor with ParsedDelete
Merge remote-tracking branch 'upstream/master'