Upgrade to MongoDB 2.6.0

- All unit test passed but still running Mongo Java Driver 2.11.4
Upgrade to MongoDB 2.6.1

- All unit tests pass
Upgrade to MongoDB 2.6.0

- All unit test passed but still running Mongo Java Driver 2.11.4
Upgrade to MongoDB 2.6.1

- All unit tests pass
Remove unused class OplogProcessor
Try to set more sensible log levels, and other log message tweaks
Merge branch 'remove-unused-class'
Merge branch 'logging-level-tweaks'