fix(DomRenderer): correctly handle namespaced attributes

Closes #6363

modules/angular2/test/core/linker/integration_spec.ts

@@ -1848,7 +1848,7 @@ function declareTests() {
 
                    if (!IS_DART) {
                      var firstAttribute = DOM.getProperty(<Element>use, 'attributes')[0];
-                     expect(firstAttribute.name).toEqual('xlink:href');
+                     expect(firstAttribute.name).toEqual('href');
                      expect(firstAttribute.namespaceURI).toEqual('http://www.w3.org/1999/xlink');
                    } else {
                      // For Dart where '_Attr' has no instance getter 'namespaceURI'
@@ -1860,6 +1860,48 @@ function declareTests() {
            }));
 
       });
+
+      describe('attributes', () => {
+
+        it('should support attributes with namespace',
+           inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder,
+                                                               async) => {
+             tcb.overrideView(SomeCmp, new ViewMetadata({template: '<svg:use xlink:href="#id" />'}))
+                 .createAsync(SomeCmp)
+                 .then((fixture) => {
+                   let useEl = DOM.firstChild(fixture.debugElement.nativeElement);
+                   expect(DOM.getAttributeNS(useEl, 'http://www.w3.org/1999/xlink', 'href'))
+                       .toEqual('#id');
+                   async.done();
+                 });
+           }));
+
+        it('should support binding to attributes with namespace',
+           inject([TestComponentBuilder, AsyncTestCompleter], (tcb: TestComponentBuilder,
+                                                               async) => {
+             tcb.overrideView(SomeCmp,
+                              new ViewMetadata({template: '<svg:use [attr.xlink:href]="value" />'}))
+                 .createAsync(SomeCmp)
+                 .then((fixture) => {
+                   let cmp = fixture.debugElement.componentInstance;
+                   let useEl = DOM.firstChild(fixture.debugElement.nativeElement);
+
+                   cmp.value = "#id";
+                   fixture.detectChanges();
+
+                   expect(DOM.getAttributeNS(useEl, 'http://www.w3.org/1999/xlink', 'href'))
+                       .toEqual('#id');
+
+                   cmp.value = null;
+                   fixture.detectChanges();
+
+                   expect(DOM.hasAttributeNS(useEl, 'http://www.w3.org/1999/xlink', 'href'))
+                       .toEqual(false);
+
+                   async.done();
+                 });
+           }));
+      });
     }
   });
 }
@@ -2439,3 +2481,8 @@ class DirectiveWithPropDecorators {
 
   fireEvent(msg) { ObservableWrapper.callEmit(this.event, msg); }
 }
+
+@Component({selector: 'some-cmp'})
+class SomeCmp {
+  value: any;
+}