Feature #907 : integrating Aurore's work around the homepage of a suggestion box.
(adding angular locale management)
(fixing unit tests)
Feature #907 : refactoring
(get back Transaction mechanism introduced by Miguel to handled the finest as possible the JPA transaction into a service)
(moving user notification sending from SuggestionBox.Suggestions to SuggestionBoxService)
(moving the specific status information of suggestion to the ContributionValidation that is a common object)