[nwam-dev] code review for 10116

[Anurag S. Maskey]

Bug 10116 nwamd core dump while handling SIGTERM

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

Signal handling checks to make sure that the phase 1 manifest has been 
imported (as discussed in bug report).

Anurag