Add more functionality to node cleanup

Pass a variable to cleanup nodes.
Add deallocation of floating IPs to cleanup

Change-Id: I54fce3fc23f5ef6efda6270b6a16d2f132b03c04
Networker node changes

The networker node needs to have the bridge set up prior
to applying the hostgroup

Change-Id: I38990511832ad55b41bdc36c7eded037add74731
PAUSED: Use `git resume` to continue working.