Fixed setExpectedException() default value for PHPUnit 5.7.23 (#4566)
Fixed setExpectedException() default value for PHPUnit 5.7.23 (#4566)

There has some update on [PHPUnit 5.7.23][]. It's solve
the exception with empty message but adjust default behavior,
so that we should fix default value on `setExpectedException()`
method for this update.

[PHPUnit 5.7.23]: https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-5.7.md#5723---2017-10-15
Codeception/base,Naktibalda/Codeception,Naktibalda/Codeception,tasselchof/Codeception,Codeception/Codeception,tasselchof/Codeception,Codeception/base,Codeception/Codeception,Codeception/base,tasselchof/Codeception,Naktibalda/Codeception