ignore IDEA working directory
add graceful stop() to OncRpcSvc
Merge pull request #7 from radai-rosenblatt/master

ignore IDE files, add graceful stop() to rpc server
portmap: add OncRpcEmbeddedPortmap#shutdown()

add a possibility to shutdown embedded portpap service.

Ached-by: Gerd Behrmann
Target: master
Ticket: #8551