Fix MultiTemplateParser to not eat its closing tag (#4756)

tests/app/xml-parser-tests/itemTemplates.xml

@@ -0,0 +1,15 @@
+<TabView>
+    <TabView.items>
+        <TabViewItem title="My Tab">
+            <TabViewItem.view>
+                <ListView items="{{ $value }}" itemTemplateSelector="selectItemTemplate">
+                    <ListView.itemTemplates>
+                        <template key="foo">
+                            <Label text="{{ title }}" />
+                        </template>
+                    </ListView.itemTemplates>
+                </ListView>
+            </TabViewItem.view>
+        </TabViewItem>
+    </TabView.items>
+</TabView>

tests/app/xml-parser-tests/xml-parser-tests.ts

@@ -5,6 +5,7 @@
 import * as TKUnit from "../TKUnit";
 import * as xmlModule from "tns-core-modules/xml";
 import * as fs from "tns-core-modules/file-system";
+import * as builder from "tns-core-modules/ui/builder";
 
 export var test_XmlParser_IsDefined = function () {
     TKUnit.assertNotEqual(xmlModule.XmlParser, undefined, "Class XmlParser should be defined!");
@@ -182,3 +183,12 @@ export var test_XmlParser_NamespacesTest = function () {
     var xmlString = file.readTextSync();
     xmlParser.parse(xmlString);
 };
+
+export function test_MultiParserTemplate() {
+    const file = fs.File.fromPath(fs.path.join(__dirname, "itemTemplates.xml"));
+    const xml = file.readTextSync();
+
+    const view: any = builder.parse(xml);
+    TKUnit.assertNotNull(view.items)
+    TKUnit.assertEqual(view.items.length, 1);
+}