In multi_host mode, floating ip(s) addr and NAT rules are still on
source node after resize/migrate instance. This patch fixes it up by
adding new methods in network.api to moving them to the destination
node.
Also adds the new methods to network/quantumv2/api.py. They do nothing
but pass for now.
This patch updates network RPC API to version 1.1
Fixes bug 1053344
Change-Id: If9f30050d37831f108ac4a1c8a018d820818f3b6