The API of the session info returns parameters in snake case instead of
camel case.
This patch chagne the expected field to match the API. It was also
modified to accept empty fields and store them as null.
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
The StreamManager getStreams returns an hirarchy of classes. This patch
import StreamManagerMBean with the class hirarchy and add an
implementation to StreamManager.
The implementation is based on the stream_manager API.
Signed-off-by: Amnon Heiman <amnon@scylladb.com>
