Add dev:tests:run parameter to pass arguments to phpunit

[schmengler]

Description

A new option has been added to the dev:tests:run command:

  -c, --arguments=ARGUMENTS  Additional arguments for PHPUnit. Example: "-c'--filter=MyTest'" (no spaces) [default: ""]

Fixed Issues (if relevant)

1. PHPUnit tests do not accept testsuite as argument #9477: PHPUnit tests do not accept testsuite as argument

Manual testing scenarios

1. Run bin/magento dev:tests:run unit -c'--filter=DevTestsRunCommand
2. Only the test for this PR should be executed

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)