1. Upgrade beego to v1.12.0
2. Add RequestID middleware to all HTTP requests.
3. Add Orm middleware to v2 and v2.0 APIs.
4. Remove OrmFilter from all HTTP requests.
5. Fix some test cases which cause panic in API controllers.
6. Enable XSRF for test cases of CommonController.
7. Imporve ReadOnly middleware.
Signed-off-by: He Weiwei <hweiwei@vmware.com>