replace some system path constants with Path::

3 jobs for F11035QfqWithoutTypo3 in 2 minutes and 54 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Before
passed #6449
documentation

00:01:00

 
  Build
failed #6450
snapshot

00:01:53

 
  Selenium
skipped #6451
selenium
 
Name Stage Failure
failed
snapshot Build
'extension/revision.git' -> 'typo3conf/ext/qfq/revision.git'
'extension/vendor' -> 'typo3conf/ext/qfq/vendor'
# run phpunit
cd typo3conf/ext/qfq/; pwd; vendor/bin/phpunit --configuration phpunit.xml
/home/gitlab-runner/builds/z2S3Mwv6/0/typo3/qfq/typo3conf/ext/qfq
PHP Parse error: syntax error, unexpected '|', expecting variable (T_VARIABLE) in /home/gitlab-runner/builds/z2S3Mwv6/0/typo3/qfq/typo3conf/ext/qfq/Classes/Core/Exception/AbstractException.php on line 178
Makefile:110: recipe for target 'phpunit' failed
make: *** [phpunit] Error 255
ERROR: Job failed: exit status 1