Conversion to use only jsonrpc thrift interface

Change-Id: I7378b3d043637397cc042da99f2b3b609ab85f6e
sendNotification instead of sendRequest in proxy

Change-Id: I33c6fc9ed43d97529a893476295d7b67b03263bd
Release client after using it

Change-Id: Idd00d358e347e93aacb346625fa81e76a2f76b93