ensured that total point values updates after one save
ensured that total point values updates after one save

fixes CNVS-23171

test plan:
- Create a course with post grades to SIS feature option enabled.
- Create a quiz with points
- Edit the quiz and add more points to the question or adding a
  new question with points.
- Save the quiz and see it updates the point total on the quiz
  information page.
- Go to the gradebook and see that the points show the new total.

Change-Id: I6e27302bd743de81b664fd377ce2629c7f51e251
Reviewed-on: https://gerrit.instructure.com/63885
Tested-by: Jenkins
Reviewed-by: John Corrigan <3d73713d0cc718326e4fd7c06c64e067ad6e2270@instructure.com>
Reviewed-by: Cameron Sutter <853bcc0cb8f5834b7805e8eb9a762054be43c731@instructure.com>
QA-Review: Michael Hargiss <59e3fde81b8d9a4f5e0cc016a3c2695591912604@instructure.com>
Product-Review: Jason Sparks <542e620f0c6c3447ce6e2e8c83a97102b99f89c6@instructure.com>

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