fix(compiler): support properties on SVG elements

Have DomElementSchemaRegistry support namespaced elements,
so that it does not fail when directives are applied in SVG (or xlink).
Without this fix, directives or property bindings cannot be
used in SVG.

Related to #5547

Closes #5653

modules/angular2/test/compiler/schema/dom_element_schema_registry_spec.ts

@@ -40,5 +40,8 @@ export function main() {
       expect(registry.getMappedPropName('title')).toEqual('title');
       expect(registry.getMappedPropName('exotic-unknown')).toEqual('exotic-unknown');
     });
+
+    it('should detect properties on namespaced elements',
+       () => { expect(registry.hasProperty('@svg:g', 'id')).toBeTruthy(); });
   });
 }