Makes our API default to censoring question answers

Closes CNVS-22194

Test Plan:
  - No functional changes

Change-Id: I1969fcbec81e9519c7b48c79f79178fdee389923
Reviewed-on: https://gerrit.instructure.com/59413
Tested-by: Jenkins
Reviewed-by: John Corrigan <jcorrigan@instructure.com>
QA-Review: Deepeeca Soundarrajan <dsoundarrajan@instructure.com>
Product-Review: Ryan Taylor <rtaylor@instructure.com>

lib/api/v1/quiz_submission_question.rb

@@ -29,6 +29,7 @@ module Api::V1::QuizSubmissionQuestion
   # @param [Hash] meta[:session]
   # @param [Boolean] meta[:censored] if answer correctness should be censored out
   def quiz_submission_questions_json(quiz_questions, quiz_submission, meta = {})
+    meta[:censored] ||= true
     quiz_questions = [ quiz_questions ] unless quiz_questions.kind_of?(Array)
     includes = (meta[:includes] || []) & INCLUDABLES
 

spec/apis/v1/quizzes/quiz_submission_questions_api_spec.rb

@@ -327,17 +327,21 @@ describe Quizzes::QuizSubmissionQuestionsController, :type => :request do
       end
 
       it "shouldn't give any answers information" do
-        question = create_question 'multiple_choice'
+        mc = create_question 'multiple_choice'
+        formula = create_question 'numerical'
 
         json = api_answer({
           quiz_questions: [{
-            id: question.id,
+            id: mc.id,
             answer: 1658
-          }]
+          }, {
+            id: formula.id,
+            answer: 40.0
+            }]
         })
 
-        # TODO: add more question types checks for no leaked answers
-        expect(json['quiz_submission_questions'].flat_map {|h| h["answers"].flat_map(&:keys) }.uniq.include? "weight").to be_falsey
+        expect(json['quiz_submission_questions'][0]["answers"].map(&:keys).uniq.include? "weight").to be_falsey
+        expect(json['quiz_submission_questions'][1]["answers"]).to equal(nil)
       end
 
       context 'answering questions' do