fix an issue mocking classes w/ traits
fix an issue mocking classes w/ traits

if a trait's method declaration fell at the wrong line number, it'd
cause a syntax error, due to the random injection of the transformer

note that this didn't always happen, because of the way the strpos/
substr seek works — it only happened when a trait's method's line
number appeared in an appropriate place in the parent class

methods from traits show the same class name as the including class:
https://bugs.php.net/bug.php?id=64963
http://mouf-php.com/blog/php_reflection_api_traits

closes Codeception/AspectMock#12

marcellovetro/AspectMock,torreytsui/AspectMock,Codeception/AspectMock,stefandoorn/AspectMock