Add support for admin_state (role)

Signed-off-by: Anantha Ramaiah <ananth@ntti3.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
vrrp: add statistic support

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
msgpack rpc helper

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
msgpack-rpc fixes and improvements

- make create_request returns msgid
- fix msgid wrap around
- rename classes
- convenient transport classes for socket-like
- update requirements
- copyright notice, comments, and assertions

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
rpc/lib/rpc.py should be previous commit

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
make vrrp event.py dependent for manager.py

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>