[nwam-dev] review for bug 10804

[Anurag S. Maskey]

quick code review:

http://defect.opensolaris.org/bz/show_bug.cgi?id=10804

http://zhadum.east/export/ws/am223141/temp/nwam1-work/webrev/

removes  nwamd/use_net_svc and nwamd/idle_time SMF properties during 
upgrade if they exist.

Thanks
Anurag