mongodb/mongo — pull request #150 by sphing (2011-12-08 02:20:14+00:00)
Title: Keeping version number if present in rs.reconfig

Details in https://jira.mongodb.org/browse/SERVER-4452

This change will respect the version in the replica set configuration object if passed in via rs.reconfig.

Tests:

*Correctly failed when passed in old version
*Correctly failed when passed in current version
*Correctly updated when passed in new version
*Correctly updated when no version passed in (still backwards compatible)