fix($templateRequest): propagate HTTP status on failed requests

src/ng/templateRequest.js

@@ -49,7 +49,8 @@ function $TemplateRequestProvider() {
       function handleError(resp) {
         self.totalPendingRequests--;
         if (!ignoreRequestError) {
-          throw $compileMinErr('tpload', 'Failed to load template: {0}', tpl);
+          throw $compileMinErr('tpload', 'Failed to load template: {0} (HTTP status: {1} {2})',
+            tpl, resp.status, resp.statusText);
         }
         return $q.reject(resp);
       }

test/ng/templateRequestSpec.js

@@ -39,7 +39,7 @@ describe('$templateRequest', function() {
   it('should throw an error when the template is not found',
     inject(function($rootScope, $templateRequest, $httpBackend) {
 
-    $httpBackend.expectGET('tpl.html').respond(404);
+    $httpBackend.expectGET('tpl.html').respond(404, '', {}, 'Not found');
 
     $templateRequest('tpl.html');
 
@@ -48,7 +48,7 @@ describe('$templateRequest', function() {
     expect(function() {
       $rootScope.$digest();
       $httpBackend.flush();
-    }).toThrowMinErr('$compile', 'tpload', 'Failed to load template: tpl.html');
+    }).toThrowMinErr('$compile', 'tpload', 'Failed to load template: tpl.html (HTTP status: 404 Not found)');
   }));
 
   it('should not throw when the template is not found and ignoreRequestError is true',