OO-1808: show a message if the course element cannot deliver a view after an author published the course

no-jira: small selenium test to create and delete a business group, selenium to test concurrent editing of a course

OO-1616: fix the certificate unit test in the REST API suite, don't doInSync during import of the course, remove get resource method (duplicate), remove unused constructor and method

no-jira: add selenium test for the direct deletion of user, remove empty info in the panel to create a business group, add the missing parameter of the uploaded by i18n key in different languages

no-jira: add a user prefs.js for FireFox to prevent password saving, Firefox homepage with last version 42...

OO-1805: check responses boundaries before opening the rich text editor to prevent array out of bound exception

OO-1770: beautify docx export for Pages and LibreOffice and lot more polish for the forum in general

OO-1770: make the selenium tests which use the collaboration tools more reliable, more unit tests for forum

OO-1770: remove the maven repository of codehaus, more unit tests for forum, hardened the closing of the info blue box, fix an issue with the blue box, fix an issue with AssessmentTest.bulkAssessment on PostgreSQL

OO-1799: don't remove the reference of Test, Survey, Selt-test, CP and SCORM during the copy of a course element within the course