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
/**
 * Configures the next view services. This method is meant to be overridden in
 * view services implementations. It is called before `load` and takes the view
 * service instance that will replace the current one.
 * The default implementation does nothing.
 *
 * @method _setNextViewServiceParameters
 * @protected
 * @param {eZ.ViewService} service the new active view service
 * @return {eZ.ViewService} the new view service
 */