update device server, recording server

* 18ef3bb : update kainode registered to kup event condition successfully
* 15bd7cf : update amegia pnp service
* acffdf5 : merge amegia pnp feature to devel from wanguo project
* b384173 : update recording server 2.0 for compatibility with the current arbiter
* e7cabcd : revert DeviceCommsAPI.thrift getDevices()
* e07ca20 : update fastdfs/fastdht related class and function
* 2743d9d : update fastdht/dfs related files and classes
* b56fcf1 : update fastdht client interface, add fdht_client_init_from_buffer