[1.7.0] Refactor HTMLModule unit tests

- AttrCollections does not barf when an inclusion is not present
- HTMLDefinition configuration directives now use new syntax
- Added %HTML.AllowedModules and %HTML.CoreModules for testing
- Extend Harness so that it can accept a default configuration object member variable
- Refactor modules to use Scaffolding, which defines some custom attributes that allows for the easy testing of attribute collections

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1082 48356398-32a2-884e-a903-53898d9a118a

tests/HTMLPurifier/HTMLModule/ImageTest.php

@@ -7,6 +7,8 @@ class HTMLPurifier_HTMLModule_ImageTest extends HTMLPurifier_HTMLModuleHarness
     
     function test() {
         
+        $this->setupScaffold('Image');
+        
         // max
         $this->assertResult(
             '<span>
@@ -16,6 +18,7 @@ class HTMLPurifier_HTMLModule_ImageTest extends HTMLPurifier_HTMLModuleHarness
                     longdesc="example.description.txt"
                     height="42"
                     width="42"
+                    ac:common="yes"
                  />
              </span>'
         );