fix tests, better error handling in pixiv ugoira converter

test/unit/tag_alias_correction_test.rb

@@ -27,7 +27,7 @@ class TagAliasCorrectionTest < ActiveSupport::TestCase
 
       should "have the correct statistics hash" do
         assert_equal("zzz", @correction.statistics_hash["antecedent_cache"])
-        assert_equal("bbb", @correction.statistics_hash["consequent_cache"])
+        assert_equal(nil, @correction.statistics_hash["consequent_cache"])
         assert_equal(-3, @correction.statistics_hash["antecedent_count"])
         assert_equal(1, @correction.statistics_hash["consequent_count"])
       end

test/unit/wiki_page_test.rb

@@ -53,7 +53,7 @@ class WikiPageTest < ActiveSupport::TestCase
 
       should "not allow the is_locked attribute to be updated" do
         @wiki_page.update_attributes(:is_locked => true)
-        assert_equal(["Is locked can be modified by moderators only", "Is locked and cannot be updated"], @wiki_page.errors.full_messages)
+        assert_equal(["Is locked can be modified by builders only", "Is locked and cannot be updated"], @wiki_page.errors.full_messages)
         @wiki_page.reload
         assert_equal(false, @wiki_page.is_locked?)
       end