CLC-2548: Factor changeable student info out of UserApi feed

https://jira.ets.berkeley.edu/jira/browse/CLC-2548

Backend changes
- removed alert from the status feed
- removed student_info from the status feed
- retained 4 properties, formerly part of student_info, in the status feed:
  has_student_history
  has_instructor_history
  has_academics_tab
  has_financials_tab
- added route /api/blog
- removed route /api/blog/release_notes/latest
- included alert in /api/blog
- included entries in /api/blog EtsBlog:ReleaseNotes->get_latest_release_notes
- included alert (when present) in /api/my/badges
- included student_info in /api/my/badges
- Updated dummy status.json file with recent real data.  Many fields were not being returned.
- deleted public/dummy/json/status_no_reg_status_available.json. There is no longer reg status available in the UserApi /api/my/status feed.
- user_api_specs checking for alert entry have been moved to the blog_feed_controller
- removed debug comments from the bottom of the user_api_spec
- Had conflicting model names in student_info and user api controller:
  * CampusData is now callled CampusOracle::Queries
  * CampusUserCoursesProxy.new is now CampusOracle::UserCourses
  * UserVisit  now is User::Visit
- added test that assure empty xml responses should return nil from alert.get_latest
- renamed blog_feed_controller to blog_feed_controller_spec