Fixes sebastianbergmann/phpunit-mock-objects#81.

 * Ensure that mock methods preserve pass-by-reference.
Merge pull request #776 from whatthejeff/phpunit-mock-objects/issue_81
Earlier declaration of $time in Util/PHP.php.

When running tests in strict mode, PHP complains about an undeclared $time variable at the end of the processChildResult function. Moving the $time initialisation at the top of the function fixes it.
Merge pull request #778 from noihex/3.7
Fixes #710

 * Ensure isolation tests display errors so they can be handled by the test runner.
Merge pull request #779 from whatthejeff/issue_710
Merge branch '3.7'
Trying to fix incompability with symfony 2.2