[RELEASE] Release of TYPO3 6.0.2

Change-Id: I9c9635363f5022c8c21fe34b7b6d67bb676cfbd4
Reviewed-on: https://review.typo3.org/18283
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team
[TASK] Set TYPO3 version to 6.0.3-dev

Change-Id: I99ae446f9ecfef13b7f6e0b553f826446fd0504a
Reviewed-on: https://review.typo3.org/18284
Reviewed-by: TYPO3 Release Team
Tested-by: TYPO3 Release Team