blueprint ryu-plugin-update-for-ryu
Now ryu has GRE tunnel support, so update ryu plugin to support it.
This implements/simplifies GRE tunneling support for ryu plugin
Change-Id: I158affcb60c9016753dbbbf5f1ad50286af49c23
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>