[TASK] Update to phpunit 4.7

[TASK] Update to phpunit 4.7

Update to latest stable for no specific reason. Since
we are trying to keep master & 6.2 in sync on the testing
side, the patch is requested for 6.2 as well.

Resolves: #67312
Releases: master, 6.2
Change-Id: I7b42083a80a1b0ba2af9074793d9413c6008820f
Reviewed-on: http://review.typo3.org/39977
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>
Reviewed-by: Frank Nägler <typo3@naegler.net>
Tested-by: Frank Nägler <typo3@naegler.net>