Shuffle- randomization of choices

[Benny]

As an instructor I want there to be different orders of choices in a Tutor assignment so students can engage more fully to think through answers. The variety will enhance a teacher’s confidence in the integrity of Tutor material.

Feature brief: https://docs.google.com/document/d/1pGUeCSI0UEYPq1s3y4d8XlHbZ0w8Dth0pYu1I4QL5jo/edit#

Behavior Documentation: https://docs.google.com/document/d/10wZeyJYIZtppBHQ6M6P0rMlr3BPRV7bVsB9Lkaa9p-o/edit#heading=h.v72tdcg98bax

Tests: https://docs.google.com/document/d/1PGfvvdO8yxolI8H62hwRGRCUKxD4jBgbETtCHr3hkhs/edit#

Visuals: https://www.figma.com/file/2ESAKAX4vckuZ54Cy1yrEk/Randomization?node-id=0%3A1