Change4: Fix references of plugin namespace in cache
Change4: Fix references of plugin namespace in cache

Jonatasmz/php-buildpack,ryosuzuki/php-buildpack,ryosuzuki/php-buildpack,Jonatasmz/php-buildpack,Scalingo/php-buildpack,Scalingo/php-buildpack,Scalingo/php-buildpack,cachethq/cachet-buildpack