Add ability for proposal positions to be shuffled on load

Authored by Harjotsingh on Aug 16 2017, 10:50 AM.

Description

Add ability for proposal positions to be shuffled on load

Currently the quiz extension only shuffles the order of questions using Js.
This change adds shuffling feature for proposal for each questions by using
shuffle function of Php.It is achieved by using shuffleanswer parameter for
quiz.

Bug: T170799
Change-Id: I471984b7a9eb1faa0f5e4e4dae7c519312e495ea

Details