Changed class loading to new file structure, moved dependency to framework/thirdparty,
rather than relying on "second level" dependencies through Zend_Translate_RailsYAML.
To be replaced by a composer dependency (+ proper autoloading) once in place.
- Do not skip the cache if there are currently no environmental specific spec, just use the an empty variantKeySpec.
- When doing a regeneration of the config, clear the previous values from the array before regeneration.
