limit quiz and results scopes to current_user access

now managers and reviewers can only see quizzes and completed results for those quizzes they have been assigned to.

Gemfile

@@ -54,6 +54,7 @@ group :development, :test do
   gem 'byebug', platform: :mri
   gem 'pry-byebug'
   gem 'pry-rails'
+  gem 'table_print'
   gem 'faker'
 
   gem 'brakeman'