EZS-26 - Implement redirection after a user finishes editing the content in the Content Edit form

https://jira.ez.no/browse/EZS-26

**Implemented:**
* [x] Custom redirection on publish action,
* [x] Custom redirection on close action,
* [x] Custom redirection on discard action,
* [x] Method to set next view service params when switching active view services.
* [x] JS unit tests
I would rather use the same system as for `getViewParameters` ie there should be a `_setNextViewServiceParameters` method that is meant to be overridden and then the view service plugins should also have a chance to configure the next service. That would give something like:

```js
setNextViewServiceParameters: function (newService) {
    var that = this;

    this._setNextViewServiceParameters(newService);
    Y.Object.each(this._plugins, function (fn, name) {
        that[name].setNextViewServiceParameters(newService);
    });
    return newService;
}
```

of course the base view service plugin needs to be updated to get `setNextViewServiceParameters` method.