tornado_swagger_ui support query operation in "GET" method, and support methods in...

tornado_swagger_ui support query operation in "GET" method, and support methods in model

query: GET /item?property1=1&property2=1
methods in model:
    @swagger.model()
    class Item:
        def format_http(self):
            pass
        @staticmethod
        def item_from_dict(item_dict):
            pass
        @classmethod
        def test_classmethod(cls):
            pass

JIRA: FUNCTEST-250

Change-Id: I12f937c4d2f64f93dc1194a8ad982e8b7ff21b7c
Signed-off-by: SerenaFeng <feng.xiaowei@zte.com.cn>