[TASK] Rename jointpoint to joinPoint

Change also the name of the annotations

Change-Id: I888eb836c4d0b9b6f2384a3678f356b8d6cabead
Reviewed-on: http://review.typo3.org/32343
Reviewed-by: Tim Lochmüller <tim@fruit-lab.de>
Tested-by: Tim Lochmüller <tim@fruit-lab.de>