[api.swagger]-swagger ui support

[mononobi]

add each new route into a list in api.swagger package to be able to generate api doc from it.
extract param names from args, and param types and keyword args from docs.
and register each api module as a dict key, and the values would be all api methods of that module with all info. this package must process the docs in after_packages_loaded() hook of packaging.

[mononobi]

add a service to application to get Route instance by route url.

[mononobi]

Add yaml doc for pyrin exposed api services.

[mononobi]

Add yaml doc for pyrin exposed api services.

Done

[mononobi]

Done, thanks to awesome flasgger and custom fine tunings.