Fix code coverage error on @runTestsInSeparateProcesses

[drewblin]

To fix bug
#3492

Current error text:

PHP Fatal error:  Uncaught Error: Class 'SebastianBergmann\CodeCoverage\CodeCoverage' not found in Standard input code:302
Stack trace:
#0 Standard input code(2250): __phpunit_run_isolated_test()
#1 {main}
  thrown in Standard input code on line 302

[sebastianbergmann]

Thank you for your contribution. I appreciate the time you invested in preparing this pull request. However, I have decided not to merge it because it makes no sense to me.

The name of the class in question is SebastianBergmann\CodeCoverage\CodeCoverage, not PHPUnit\SebastianBergmann\CodeCoverage\CodeCoverage, unless phpunit.phar is used. And #3953, which affected this, was fixed in 887e5c3.

If you are still experiencing a problem regarding phpunit.phar, process isolation, and code coverage then please open a new ticket.