style(ngViewSpec): pretify some tests with $destroy events

Author: IgorMinar

test/directive/ngViewSpec.js

@@ -317,11 +317,7 @@ describe('ng-view', function() {
     var createCtrl = function(name) {
       return function($scope) {
         log.push('init-' + name);
-        var destroy = $scope.$destroy;
-        $scope.$destroy = function() {
-          log.push('destroy-' + name);
-          destroy.call($scope);
-        }
+        $scope.$on('$destroy', function() {log.push('destroy-' + name);});
       };
     };
 
@@ -369,11 +365,7 @@ describe('ng-view', function() {
     function createController(name) {
       return function($scope) {
         log.push('init-' + name);
-        var destroy = $scope.$destroy;
-        $scope.$destroy = function() {
-          log.push('destroy-' + name);
-          destroy.call($scope);
-        }
+        $scope.$on('$destroy', logger('destroy-' + name));
         $scope.$on('$routeUpdate', logger('route-update'));
       };
     }