NOVALIBRARY: Change StartHaystack to include -m flag

StartHaystack's arguments for Honeyd were depending on honeyd correctly
defaulting to /usr/shar/ehoneyd/ for the location of the nmap-mac-prefixes
file, which may not be there if nmap was installed after honeyd was. As we 
have a version of this file within our repo that gets installed into 
/usr/share/nova/sharedFiles/, added a -m flag with the value being the path
to that file, /usr/share/nova/shareFiles/nmap-mac-prefixes

close #654