spec: fix quiz validation specs for ruby 1.8

Change-Id: I7a5e87e9327d77924a74c50e88373afe3ad210e7
Reviewed-on: https://gerrit.instructure.com/17726
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jake Sorce <jake@instructure.com>
QA-Review: Jake Sorce <jake@instructure.com>

Author: simonista

spec/models/quiz_spec.rb

@@ -1055,7 +1055,7 @@ def expect_multi_value_row(row, expected_name, expected_values)
         quiz = @course.quizzes.create! :title => "test quiz"
         quiz.quiz_type = "totally_invalid_quiz_type"
         quiz.save.should be_false
-        quiz.errors.any?{|e| e =~ /quiz_type/}.should be_true
+        quiz.errors["invalid_quiz_type"].should be_present
       end
 
       it "should not validate quiz_type if not changed" do
@@ -1073,7 +1073,7 @@ def expect_multi_value_row(row, expected_name, expected_values)
         quiz = @course.quizzes.create! :title => "test quiz"
         quiz.ip_filter = "999.999.1942.489"
         quiz.save.should be_false
-        quiz.errors.any?{|e| e =~ /ip_filter/}.should be_true
+        quiz.errors["invalid_ip_filter"].should be_present
       end
 
       it "should not validate ip_filter if not changed" do
@@ -1091,7 +1091,7 @@ def expect_multi_value_row(row, expected_name, expected_values)
         quiz = @course.quizzes.create! :title => "test quiz"
         quiz.hide_results = "totally_invalid_value"
         quiz.save.should be_false
-        quiz.errors.any?{|e| e =~ /hide_results/}.should be_true
+        quiz.errors["invalid_hide_results"].should be_present
       end
 
       it "should not validate hide_results if not changed" do