refactor of system vm branch pushed

[Daan Hoogland <da...@gmail.com>]

H,

I just pushed a branch feature/systemvm-persistent-config to the
apache git server. It contains work by some colleagues, notibly Ian
Southam and WIlder Rodrigues. We started work on this last summer. We
now are closing in to conclusion and want to get feed back.

Our prime reason to do this was that we need redundancy in our vpc routers.

next to that we set some secondary objectives some of which got more
realization then others.
- persistent configuration so routers and such would survive reboot
without cloudstack management intervention
- better testatbility for the systemvm
- code unification of the normal and vpc routers
- code refactor of the virtual network appliance managers
- code refactor of the virtual network appliance resource
I probably left out a few.

I will be call a merge a while and for now just want to have it in the
apache git now. For anyone in London next week, Wilder will be giving
a demo of of the functionality.

good night,
-- 
Daan