small optimizations to grouter

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7299 b45a01b8-16f6-495d-af2f-9b41ad6348cc
updated network simulator with new grouter methods

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7300 b45a01b8-16f6-495d-af2f-9b41ad6348cc