Fixed PHP-1083: 2.6.1-rc0 requires $gt for OplogReplay
Merge pull request #683 from bjori/fix-nightly-tests

Fixed PHP-1083: 2.6.1-rc0 requires $gt for OplogReplay

* bjori/fix-nightly-tests:
  Fixed PHP-1083: 2.6.1-rc0 requires $gt for OplogReplay