Fisrt patch to implement the framework of Kingbird, this is
the part1 for web service with keystone authentication
integrated, and API part with helloworld rest quest example.
Blueprint: https://blueprints.launchpad.net/kingbird/+spec/kingbird-framework
Change-Id: Ia33247132c6a4945f76f0819cf90acf6e8d2154d
Signed-off-by: Chaoyi Huang <joehuang@huawei.com>