Fix ActiveSupport tests that depend on run order

activesupport/test/autoloading_fixtures/class_folder/class_folder_subclass.rb

 class ClassFolder::ClassFolderSubclass < ClassFolder
-  ConstantInClassFolder
+  ConstantInClassFolder = 'indeed'
 end

activesupport/test/core_ext/module/qualified_const_test.rb

@@ -67,17 +67,24 @@ class QualifiedConstTest < ActiveSupport::TestCase
   end
 
   test "qualified_const_set" do
-    m = Module.new
-    assert_equal m, Object.qualified_const_set("QualifiedConstTestMod2", m)
-    assert_equal m, ::QualifiedConstTestMod2
-
-    # We are going to assign to existing constants on purpose, so silence warnings.
-    silence_warnings do
-      assert_equal true, QualifiedConstTestMod.qualified_const_set("QualifiedConstTestMod::X", true)
-      assert_equal true, QualifiedConstTestMod::X
-
-      assert_equal 10, QualifiedConstTestMod::M.qualified_const_set("X", 10)
-      assert_equal 10, QualifiedConstTestMod::M::X
+    begin
+      m = Module.new
+      assert_equal m, Object.qualified_const_set("QualifiedConstTestMod2", m)
+      assert_equal m, ::QualifiedConstTestMod2
+
+      # We are going to assign to existing constants on purpose, so silence warnings.
+      silence_warnings do
+        assert_equal true, QualifiedConstTestMod.qualified_const_set("QualifiedConstTestMod::X", true)
+        assert_equal true, QualifiedConstTestMod::X
+
+        assert_equal 10, QualifiedConstTestMod::M.qualified_const_set("X", 10)
+        assert_equal 10, QualifiedConstTestMod::M::X
+      end
+    ensure
+      silence_warnings do
+        QualifiedConstTestMod.qualified_const_set('QualifiedConstTestMod::X', false)
+        QualifiedConstTestMod::M.qualified_const_set('X', 1)
+      end
     end
   end
 

activesupport/test/dependencies_test.rb

@@ -679,6 +679,8 @@ def test_unloadable_should_return_change_flag
       assert_equal true, M.unloadable
       assert_equal false, M.unloadable
     end
+  ensure
+    Object.class_eval { remove_const :M }
   end
 
   def test_unloadable_constants_should_receive_callback

activesupport/test/inflector_test.rb

@@ -169,11 +169,11 @@ def test_acronyms_camelize_lower
   def test_underscore_acronym_sequence
     ActiveSupport::Inflector.inflections do |inflect|
       inflect.acronym("API")
-      inflect.acronym("HTML5")
+      inflect.acronym("JSON")
       inflect.acronym("HTML")
     end
 
-    assert_equal("html5_html_api", ActiveSupport::Inflector.underscore("HTML5HTMLAPI"))
+    assert_equal("json_html_api", ActiveSupport::Inflector.underscore("JSONHTMLAPI"))
   end
 
   def test_underscore