Fix a probleme in messages contents : the URLS are enhance with html to provide a clickable anchor with the attribute target='new' in place of the URL. But the HTML anchors already present in contents without the target attribute were not modified to add id.
Apply fix on every contents.
Add unit test for MessageUtils.addMissingTargetToAnchors()
Merge pull request #50 from GIP-RECIA/fix-TargetBlankContents

NOJIRA: Fix target blank contents