Added netfilter initialization when starting hva
Changed the netfilter service from a node module to a rpc endpoint. This is the proper way to do it since this implementation doesn't have two nodes subscribing to the same event. Also we need to be able to wait until a job is finished before issuing the next one.
reverted the ServiceNetfilter node module back to how it was in public master. This will be loaded as legacy netfilter from now on.
Fixed a mistake where I declared the netfilter flag in the wrong code block, causing hva to crash on start
Fixed a bug where chains couldn't be deleted on hva restart because they still had jumps to them