feat(Page) : handle pageApi.update and pageApi.delete exception (#710)

* handle update and delete page api exception
* remove test on page provided field
* update the code to avoid update of permission and ressource in case of exception happened on call of pageApi.update or pageApi.delete
* add junit test that check no interaction happen before an api exception
* CustomPageService.ensurePageFolderIsPresent was not done now in   `removeRestApiExtensionPermissions` method. It should be done before the `removeRestApiExtensionPermissions` called

 Relates to [RUNTIME-309](https://bonitasoft.atlassian.net/browse/RUNTIME-309)