Add the description of the Endpoints
Add the description of the Endpoints

This patch adds the description of the Endpoints and how it is
translated. The example of each response in each state is added in
Appendix A as well.

Change-Id: Ibfeb11d9d0079bc2e943b3ff918b660d12adaa84
Signed-off-by: Taku Fukushima <d385cb54d860d8a5dcc6157b54cf213091772451@gmail.com>

celebdor/kuryr,openstack/kuryr,celebdor/kuryr-libnetwork,celebdor/kuryr,openstack/kuryr,celebdor/kuryr-libnetwork,celebdor/kuryr-libnetwork