Switch type hinting for plugin loaders
Switch type hinting for plugin loaders

- In most instances, switched from typehinting on PrefixPathMapper to use
  ShortNameLocater instead. For functionality depending on PrefixPathMapper
  definitions, added conditional logic.
- Re-fixed broken merge in Zend\Application\Resource\CacheManager tests and
  Zend\Cache\Cache front/backend loading

Maks3w/zend-loader,zendframework/zend-loader