OO-190: send ping message from client to server
OO-190: send ping message from client to server

OpenOlitor/openolitor-client-admin,OpenOlitor/openolitor-client-admin,OpenOlitor/openolitor-client-core,OpenOlitor/openolitor-client-core,OpenOlitor/openolitor-client-core,OpenOlitor/openolitor-client-admin