Skip some Logger tests when under PHP 7
Skip some Logger tests when under PHP 7

Both calling an undefined instance method as well as undefined static method now
raise an E_ERROR (instead of an E_RECOVERABLE_ERROR), which means shutdown
functions cannot be called... nor can the tests be executed.

Maks3w/zend-log,zendframework/zend-log,MadCat34/zend-log,Maks3w/zend-log,nikolaposa/zend-log,Xerkus/zend-log,zendframework/zend-log,amcsi/zend-log,amcsi/zend-log,Xerkus/zend-log,MadCat34/zend-log,nikolaposa/zend-log,3makkk/zend-log,3makkk/zend-log