Handle NQ Assignment in getting assignment points
Handle NQ Assignment in getting assignment points

closes EVAL-1821
flag=none

Test Plan:

(Will require setting up New Quizzes locally for QA)
1. Create an assignment with any submission type e.g. on paper
and assign points e.g. 10
2. Add a rubric to the assignment:
- with points different from assignment points e.g. 20
- check the setting "Use this rubric for assignment grading"
- click on "Create Rubric"
3. Make sure that the modal shows correct values for
"assignment points", "rubric points" and the "percentage"
4. Repeat steps 1-3 for an assignment with external submission
of New Quizzes

Change-Id: Id4b76d29693831aad1e03bff3af3b220c694c833
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/270074
Tested-by: Service Cloud Jenkins <9144042a601061f88f1e1d7a1753ea3e2972119d@instructure.com>
Product-Review: Jody Sailor
QA-Review: Eduardo Escobar <7e82d09bba767b0dd1222915e3d92141089e94a8@instructure.com>
Reviewed-by: Adrian Packel <9c6a39807293376f29cba17542b4cb1b663ecc4a@instructure.com>
Reviewed-by: Eduardo Escobar <7e82d09bba767b0dd1222915e3d92141089e94a8@instructure.com>

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