bug #5308 : Some HTML entities in some texts are encoded again for HTML

Remove the encoding for HTML rendering of the publications in Kmelia and in Blog. The encoding for HTML should be done at the HTML rendering and only for the data that were set by a user. (The encoding for HTML is to avoid XSS attacks.)

Don't forget to integrate also the branch bug-5308 in Silverpeas-Core and in Silverpeas-Setup.

The integration should be done also for 5.12.8-SNAPSHOT.