Two minor changes:
Two minor changes:

    1. Test the return from SocketStreamImplSIM::addAcceptor() against
       failure rather than success.  Since sim sockets are non-blocking,
       it can return vpr::ReturnStatus::InProgress.
    2. When assigning a socket to a node in the graph, do not blow away
       its port number when its IP address is 127.0.0.1.


git-svn-id: 769d22dfa2d22aad706b9a451492fb87c0735f19@7053 08b38cba-cd3b-11de-854e-f91c5b6e4272

MichaelMcDonnell/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler,vancegroup-mirrors/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,godbyk/vrjuggler-upstream-old,MichaelMcDonnell/vrjuggler,vrjuggler/vrjuggler,LiuKeHua/vrjuggler,MichaelMcDonnell/vrjuggler,LiuKeHua/vrjuggler,LiuKeHua/vrjuggler,MichaelMcDonnell/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,godbyk/vrjuggler-upstream-old,godbyk/vrjuggler-upstream-old,godbyk/vrjuggler-upstream-old,LiuKeHua/vrjuggler,MichaelMcDonnell/vrjuggler,godbyk/vrjuggler-upstream-old,vrjuggler/vrjuggler,vrjuggler/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler,godbyk/vrjuggler-upstream-old,LiuKeHua/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler