Revert "show leaks in their own group"
using valgrind would be a bit too much for travis I guess.

This reverts commit ea60d79e23556deb0f72cf4111deefa0d9a55262.
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  Revert "show leaks in their own group" using valgrind would be a bit too much for travis I guess.