src/lib/dhcpsrv/srv_config.cc
    SrvConfig::applyLoggingCfg() - now only calls LoggerManager::process()
    if the logger config isn't empty

src/bin/dhcp6/ctrl_dhcp6_srv.cc
src/bin/dhcp6/tests/dhcp6_test_utils.cc
    Minor clean up and commentary

src/bin/dhcp6/kea_controller.cc
    configure(const std::string& file_name)
    - Removed initial rollback, now done in commandSetConfigHandler()

src/bin/dhcp6/tests/ctrl_dhcp6_srv_unittest.cc
   - Removed unnecessary call to initLogger