Content create view service refactoring

Changed the way the user redirection urls are provided by the `contentCreateViewService`. 
by redefining `_redirectionUrl` like that you loose the ability to set a value in the attributes using this getter function (see https://github.com/ezsystems/PlatformUIBundle/blob/master/Resources/public/js/views/services/ez-contenteditviewservice.js#L173), this will prevent you from implementing the reason why you are doing this change... It should rather be written like: 

```js
_redirectionUrl: function (value) {
    if ( !value ) {
        return this.get('app').routeUri('viewLocation', {id: this.get('parentLocation').get('id')});
    }
    return this.constructor.superclass._redirectionUrl.apply(this, arguments);
}
```