extension add extra wrong -f flag if use paratest

[rtorralba]

Repro

1. add option "phpunit.phpunit": "vendor/bin/paratest" to settings

Outcome

php vendor/bin/paratest --testsuite=suite --configuration=phpunit.xml --filter=^.::(className)( with data set .)?$ className.php --colors=never --teamcity -f

**The "-f" option does not exist. **

Without "phpunit.phpunit": "vendor/bin/paratest" on settings doesn't add -f flag

Expected outcome

Execute test