show first ember quiz index page - the load others

closes CNVS-13364

test plan:
  - enable :quiz_stats feature to turn on ember quizzes
  - navigate to a course with more than 10 quizzes
  - navigate to quiz index
    - initially first 10 quizzes should display
    - remaining quizzes should then load and display shortly there after

Change-Id: I8478cfd4c7e3c6be5d1437e447c46e0c66fa9f17
Reviewed-on: https://gerrit.instructure.com/36354
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Derek DeVries <ddevries@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Jason Madsen <jmadsen@instructure.com>