feature #907 sprint5 :
Take into account the change in the Silverpeas Persistence API. The SuggestionRepository uses now different data managers to manage the
persistence of the Suggestion entities. It uses the new and dedicated Suggestion JPA manager (SuggestionJPAManager), the CommentService,
and the WysywygController to persist respectively the specific data of a suggestion, the comments on the suggestion (in fact the count
of comments on a given suggestion), and the rich content of a suggestion.
The test SuggestionSavingTest is deleted as it causes PermGen out of memory when the tests are ran by maven!