The socialbase like_and_dislike_service should use formatPlural

Problem

Socialbase contains an overwrite for the like_and_dislike_service to change how we display likes and dislikes. It contains an if statement that call Drupal.t which makes translation more difficult and increases the number of occurrences of "like" in translation files.

Solution

Use Drupal.formatPlural so that we can re-use the translation of @count like and @count likes