Add param for all plugins (like a param allow failures) for control paths priority when we search plugin binary #104

Add param for all plugins (like a param allow failures) for control paths priority when we search plugin binary.

Example:

test:
  php_unit:
    priority_path: global
    config:
      - phpunit.xml

Now default priority:

• Search in local current build path ('local')
• Search in global PHP Censor 'vendor/bin' path ('global')
• Search in system binaries ('system')